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244 results on '"Walker, Alexander"'

1. Self-Correlations of Hurwitz Class Numbers

Author

Walker, Alexander

Subjects
Mathematics - Number Theory, 11Mxx
Abstract

The asymptotic study of class numbers of binary quadratic forms is a foundational problem in arithmetic statistics. Here, we investigate finer statistics of class numbers by studying their self-correlations under additive shifts. Specifically, we produce uniform asymptotics for the shifted convolution sum $\sum_{n < X} H(n) H(n+\ell)$ for fixed $\ell \in \mathbb{Z}$, in which $H(n)$ denotes the Hurwitz class number., Comment: 41 pages, 0 figures

Published
2024

2. Counting Divisors in the Outputs of a Binary Quadratic Form

Author

Kuan, Chan Ieong, Lowry-Duda, David, Walker, Alexander, and Huang, Tinghao

Subjects
Mathematics - Number Theory, 11F30, 11N37, 11F72
Abstract

For a fixed natural number $h$, we prove meromorphic continuation of the two-variable Dirichlet series $\sum_m r_2(m) \sigma_w(m + h) (m + h)^{-s + w}$ to $\mathbb{C}^2$ and use this to obtain asymptotics for $\sum_{m^2 + n^2 \leq X} \sigma_w(m^2 + n^2 + h)$. We approach this continuation through spectral theory. Our results are comparable to earlier work of Bykovskii, who used different methods to study the sums $\sum_{n^2 \leq X} \sigma_w(n^2 + h)$., Comment: 41 pages, including an appendix by Kuan and Huang

Published
2023

4. Sums of Cusp Form Coefficients Along Quadratic Sequences

Author

Kuan, Chan Ieong, Lowry-Duda, David, Walker, Alexander, and Steiner, Raphael S.

Subjects
Mathematics - Number Theory
Abstract

Let $f(z) = \sum A(n) n^{(k-1)/2} e(nz)$ be a cusp form of weight $k \geq 3$ on $\Gamma_0(N)$ with character $\chi$. By studying a certain shifted convolution sum, we prove that $\sum_{n \leq X} A(n^2+h) = c_{f,h} X + O_{f,h,\epsilon}(X^{\frac{3}{4}+\epsilon})$ for $\epsilon>0$, which improves a result of Blomer from 2008 with error $X^{\frac{6}{7}+\epsilon}$. This includes an appendix due to Raphael S. Steiner, proving stronger bounds for certain spectral averages., Comment: 22 pages, with a 14 page appendix from Raphael S. Steiner. This version corrects a mistake in the previous, where lifts of holomorphic modular forms to Maass forms were omitted; and it has an updated abstract

Published
2023

7. Integer Sets of Large Harmonic Sum Which Avoid Long Arithmetic Progressions

Author

Walker, Alexander

Subjects
Mathematics - Number Theory, Mathematics - Combinatorics, 11Y55, 11Y60
Abstract

We give conditions under which certain digit-restricted integer sets avoid $k$-term arithmetic progressions. These sets are reasonably efficient to compute and therefore enable large-scale search. We identify a set with no arithmetic progression of four terms and with harmonic sum $4.43975$, which improves an earlier "greedy" construction., Comment: 9 pages, 0 figures

Published
2022

10. Social and moral psychology of COVID-19 across 69 countries

Author

Azevedo, Flavio, Pavlović, Tomislav, Rêgo, Gabriel G., Ay, F. Ceren, Gjoneska, Biljana, Etienne, Tom W., Ross, Robert M., Schönegger, Philipp, Riaño-Moreno, Julián C., Cichocka, Aleksandra, Capraro, Valerio, Cian, Luca, Longoni, Chiara, Chan, Ho Fai, Van Bavel, Jay J., Sjåstad, Hallgeir, Nezlek, John B., Alfano, Mark, Gelfand, Michele J., Birtel, Michèle D., Cislak, Aleksandra, Lockwood, Patricia L., Abts, Koen, Agadullina, Elena, Aruta, John Jamir Benzon, Besharati, Sahba Nomvula, Bor, Alexander, Choma, Becky L., Crabtree, Charles David, Cunningham, William A., De, Koustav, Ejaz, Waqas, Elbaek, Christian T., Findor, Andrej, Flichtentrei, Daniel, Franc, Renata, Gruber, June, Gualda, Estrella, Horiuchi, Yusaku, Huynh, Toan Luu Duc, Ibanez, Agustin, Imran, Mostak Ahamed, Israelashvili, Jacob, Jasko, Katarzyna, Kantorowicz, Jaroslaw, Kantorowicz-Reznichenko, Elena, Krouwel, André, Laakasuo, Michael, Lamm, Claus, Leygue, Caroline, Lin, Ming-Jen, Mansoor, Mohammad Sabbir, Marie, Antoine, Mayiwar, Lewend, Mazepus, Honorata, McHugh, Cillian, Minda, John Paul, Mitkidis, Panagiotis, Olsson, Andreas, Otterbring, Tobias, Packer, Dominic J., Perry, Anat, Petersen, Michael Bang, Puthillam, Arathy, Rothmund, Tobias, Santamaría-García, Hernando, Schmid, Petra C., Stoyanov, Drozdstoy, Tewari, Shruti, Todosijević, Bojan, Tsakiris, Manos, Tung, Hans H., Umbres, Radu G., Vanags, Edmunds, Vlasceanu, Madalina, Vonasch, Andrew, Yucel, Meltem, Zhang, Yucheng, Abad, Mohcine, Adler, Eli, Akrawi, Narin, Mdarhri, Hamza Alaoui, Amara, Hanane, Amodio, David M., Antazo, Benedict G., Apps, Matthew, Ba, Mouhamadou Hady, Barbosa, Sergio, Bastian, Brock, Berg, Anton, Bernal-Zárate, Maria P., Bernstein, Michael, Białek, Michał, Bilancini, Ennio, Bogatyreva, Natalia, Boncinelli, Leonardo, Booth, Jonathan E., Borau, Sylvie, Buchel, Ondrej, Cameron, C. Daryl, Carvalho, Chrissie F., Celadin, Tatiana, Cerami, Chiara, Chalise, Hom Nath, Cheng, Xiaojun, Cockcroft, Kate, Conway, Jane, Córdoba-Delgado, Mateo Andres, Crespi, Chiara, Crouzevialle, Marie, Cutler, Jo, Cypryańska, Marzena, Dabrowska, Justyna, Daniels, Michael A., Davis, Victoria H., Dayley, Pamala N., Delouvée, Sylvain, Denkovski, Ognjan, Dezecache, Guillaume, Dhaliwal, Nathan A., Diato, Alelie B., Di Paolo, Roberto, Drosinou, Marianna, Dulleck, Uwe, Ekmanis, Jānis, Ertan, Arhan S., Farhana, Hapsa Hossain, Farkhari, Fahima, Farmer, Harry, Fenwick, Ali, Fidanovski, Kristijan, Flew, Terry, Fraser, Shona, Frempong, Raymond Boadi, Fugelsang, Jonathan A., Gale, Jessica, Garcia-Navarro, E. Begoña, Garladinne, Prasad, Ghajjou, Oussama, Gkinopoulos, Theofilos, Gray, Kurt, Griffin, Siobhán M., Gronfeldt, Bjarki, Gümren, Mert, Gurung, Ranju Lama, Halperin, Eran, Harris, Elizabeth, Herzon, Volo, Hruška, Matej, Huang, Guanxiong, Hudecek, Matthias F. C., Isler, Ozan, Jangard, Simon, Jorgensen, Frederik J., Kachanoff, Frank, Kahn, John, Dangol, Apsara Katuwal, Keudel, Oleksandra, Koppel, Lina, Koverola, Mika, Kubin, Emily, Kunnari, Anton, Kutiyski, Yordan, Laguna, Oscar Moreda, Leota, Josh, Lermer, Eva, Levy, Jonathan, Levy, Neil, Li, Chunyun, Long, Elizabeth U., Maglić, Marina, McCashin, Darragh, Metcalf, Alexander L., Mikloušić, Igor, El Mimouni, Soulaimane, Miura, Asako, Molina-Paredes, Juliana, Monroy-Fonseca, César, Morales-Marente, Elena, Moreau, David, Muda, Rafał, Myer, Annalisa, Nash, Kyle, Nesh-Nash, Tarik, Nitschke, Jonas P., Nurse, Matthew S., Ohtsubo, Yohsuke, de Mello, Victoria Oldemburgo, O’Madagain, Cathal, Onderco, Michal, Palacios-Galvez, M. Soledad, Palomöki, Jussi, Pan, Yafeng, Papp, Zsófia, Pärnamets, Philip, Paruzel-Czachura, Mariola, Pavlović, Zoran, Payán-Gómez, César, Perander, Silva, Pitman, Michael Mark, Prasad, Rajib, Pyrkosz-Pacyna, Joanna, Rathje, Steve, Raza, Ali, Rhee, Kasey, Robertson, Claire E., Rodríguez-Pascual, Iván, Saikkonen, Teemu, Salvador-Ginez, Octavio, Santi, Gaia C., Santiago-Tovar, Natalia, Savage, David, Scheffer, Julian A., Schultner, David T., Schutte, Enid M., Scott, Andy, Sharma, Madhavi, Sharma, Pujan, Skali, Ahmed, Stadelmann, David, Stafford, Clara Alexandra, Stanojević, Dragan, Stefaniak, Anna, Sternisko, Anni, Stoica, Augustin, Stoyanova, Kristina K., Strickland, Brent, Sundvall, Jukka, Thomas, Jeffrey P., Tinghög, Gustav, Torgler, Benno, Traast, Iris J., Tucciarelli, Raffaele, Tyrala, Michael, Ungson, Nick D., Uysal, Mete S., Van Lange, Paul A. M., van Prooijen, Jan-Willem, van Rooy, Dirk, Västfjäll, Daniel, Verkoeijen, Peter, Vieira, Joana B., von Sikorski, Christian, Walker, Alexander Cameron, Watermeyer, Jennifer, Wetter, Erik, Whillans, Ashley, White, Katherine, Habib, Rishad, Willardt, Robin, Wohl, Michael J. A., Wójcik, Adrian Dominik, Wu, Kaidi, Yamada, Yuki, Yilmaz, Onurcan, Yogeeswaran, Kumar, Ziemer, Carolin-Theresa, Zwaan, Rolf A., Boggio, Paulo S., and Sampaio, Waldir M.

Published
2023
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11. Controlling the narrative: Euphemistic language affects judgments of actions while avoiding perceptions of dishonesty

Author

Walker, Alexander C., Turpin, Martin, Meyers, Ethan, Stolz, Jennifer, Fugelsang, Jonathan, and Koehler, Derek

Subjects
Psychology, Decision making, Language and thought, Social cognition, Survey
Abstract

The present work examined the extent to which evaluations of actions could be biased by the strategic use of euphemistic (agreeable) and dysphemistic (disagreeable) terms. Across multiple studies, we demonstrate that evaluations of actions are made more favorable by replacing a disagreeable term (e.g., torture) with a semantically related agreeable term (e.g., enhanced interrogation) in an act’s description. Notably, the influence of these terms was reduced (but not eliminated) when actions were described in a less ambiguous (i.e., more detailed) manner. Despite their influence, participants judged both agreeable and disagreeable action descriptions as largely truthful and distinct from lies, and judged agents using such descriptions as more trustworthy and moral than liars. Overall, the present findings suggest that a strategic speaker can, through the careful use of language, sway the opinions of others while avoiding many of the reputational costs associated with less subtle forms of linguistic manipulation (e.g., lying).

Published
2022

19. National identity predicts public health support during a global pandemic

Author

Van Bavel, Jay J., Cichocka, Aleksandra, Capraro, Valerio, Sjåstad, Hallgeir, Nezlek, John B., Pavlović, Tomislav, Alfano, Mark, Gelfand, Michele J., Azevedo, Flavio, Birtel, Michèle D., Cislak, Aleksandra, Lockwood, Patricia L., Ross, Robert Malcolm, Abts, Koen, Agadullina, Elena, Aruta, John Jamir Benzon, Besharati, Sahba Nomvula, Bor, Alexander, Choma, Becky L., Crabtree, Charles David, Cunningham, William A., De, Koustav, Ejaz, Waqas, Elbaek, Christian T., Findor, Andrej, Flichtentrei, Daniel, Franc, Renata, Gjoneska, Biljana, Gruber, June, Gualda, Estrella, Horiuchi, Yusaku, Huynh, Toan Luu Duc, Ibanez, Augustin, Imran, Mostak Ahamed, Israelashvili, Jacob, Jasko, Katarzyna, Kantorowicz, Jaroslaw, Kantorowicz-Reznichenko, Elena, Krouwel, André, Laakasuo, Michael, Lamm, Claus, Leygue, Caroline, Lin, Ming-Jen, Mansoor, Mohammad Sabbir, Marie, Antoine, Mayiwar, Lewend, Mazepus, Honorata, McHugh, Cillian, Minda, John Paul, Mitkidis, Panagiotis, Olsson, Andreas, Otterbring, Tobias, Packer, Dominic J., Perry, Anat, Petersen, Michael Bang, Puthillam, Arathy, Riaño-Moreno, Julián C., Rothmund, Tobias, Santamaría-García, Hernando, Schmid, Petra C., Stoyanov, Drozdstoy, Tewari, Shruti, Todosijević, Bojan, Tsakiris, Manos, Tung, Hans H., Umbreș, Radu G., Vanags, Edmunds, Vlasceanu, Madalina, Vonasch, Andrew, Yucel, Meltem, Zhang, Yucheng, Abad, Mohcine, Adler, Eli, Akrawi, Narin, Mdarhri, Hamza Alaoui, Amara, Hanane, Amodio, David M., Antazo, Benedict G., Apps, Matthew, Ay, F. Ceren, Ba, Mouhamadou Hady, Barbosa, Sergio, Bastian, Brock, Berg, Anton, Bernal-Zárate, Maria P., Bernstein, Michael, Białek, Michał, Bilancini, Ennio, Bogatyreva, Natalia, Boncinelli, Leonardo, Booth, Jonathan E., Borau, Sylvie, Buchel, Ondrej, Cameron, C. Daryl, Carvalho, Chrissie F., Celadin, Tatiana, Cerami, Chiara, Chalise, Hom Nath, Cheng, Xiaojun, Cian, Luca, Cockcroft, Kate, Conway, Jane, Córdoba-Delgado, Mateo Andres, Crespi, Chiara, Crouzevialle, Marie, Cutler, Jo, Cypryańska, Marzena, Dabrowska, Justyna, Daniels, Michael A., Davis, Victoria H., Dayley, Pamala N., Delouvee, Sylvain, Denkovski, Ognjan, Dezecache, Guillaume, Dhaliwal, Nathan A., Diato, Alelie B., Di Paolo, Roberto, Drosinou, Marianna, Dulleck, Uwe, Ekmanis, Jānis, Ertan, Arhan S., Etienne, Tom W., Farhana, Hapsa Hossain, Farkhari, Fahima, Farmer, Harry, Fenwick, Ali, Fidanovski, Kristijan, Flew, Terry, Fraser, Shona, Frempong, Raymond Boadi, Fugelsang, Jonathan A., Gale, Jessica, Garcia-Navarro, E. Begoña, Garladinne, Prasad, Ghajjou, Oussama, Gkinopoulos, Theofilos, Gray, Kurt, Griffin, Siobhán M., Gronfeldt, Bjarki, Gümren, Mert, Gurung, Ranju Lama, Halperin, Eran, Harris, Elizabeth, Herzon, Volo, Hruška, Matej, Huang, Guanxiong, Hudecek, Matthias F. C., Isler, Ozan, Jangard, Simon, Jørgensen, Frederik J., Kachanoff, Frank, Kahn, John, Dangol, Apsara Katuwal, Keudel, Oleksandra, Koppel, Lina, Koverola, Mika, Kubin, Emily, Kunnari, Anton, Kutiyski, Yordan, Laguna, Oscar, Leota, Josh, Lermer, Eva, Levy, Jonathan, Levy, Neil, Li, Chunyun, Long, Elizabeth U., Longoni, Chiara, Maglić, Marina, McCashin, Darragh, Metcalf, Alexander L., Mikloušić, Igor, El Mimouni, Soulaimane, Miura, Asako, Molina-Paredes, Juliana, Monroy-Fonseca, César, Morales-Marente, Elena, Moreau, David, Muda, Rafał, Myer, Annalisa, Nash, Kyle, Nesh-Nash, Tarik, Nitschke, Jonas P., Nurse, Matthew S., Ohtsubo, Yohsuke, Oldemburgo de Mello, Victoria, O’Madagain, Cathal, Onderco, Michal, Palacios-Galvez, M. Soledad, Palomäki, Jussi, Pan, Yafeng, Papp, Zsófia, Pärnamets, Philip, Paruzel-Czachura, Mariola, Pavlović, Zoran, Payán-Gómez, César, Perander, Silva, Pitman, Michael Mark, Prasad, Rajib, Pyrkosz-Pacyna, Joanna, Rathje, Steve, Raza, Ali, Rêgo, Gabriel G., Rhee, Kasey, Robertson, Claire E., Rodríguez-Pascual, Iván, Saikkonen, Teemu, Salvador-Ginez, Octavio, Sampaio, Waldir M., Santi, Gaia C., Santiago-Tovar, Natalia, Savage, David, Scheffer, Julian A., Schönegger, Philipp, Schultner, David T., Schutte, Enid M., Scott, Andy, Sharma, Madhavi, Sharma, Pujan, Skali, Ahmed, Stadelmann, David, Stafford, Clara Alexandra, Stanojević, Dragan, Stefaniak, Anna, Sternisko, Anni, Stoica, Augustin, Stoyanova, Kristina K., Strickland, Brent, Sundvall, Jukka, Thomas, Jeffrey P., Tinghög, Gustav, Torgler, Benno, Traast, Iris J., Tucciarelli, Raffaele, Tyrala, Michael, Ungson, Nick D., Uysal, Mete S., Van Lange, Paul A. M., van Prooijen, Jan-Willem, van Rooy, Dirk, Västfjäll, Daniel, Verkoeijen, Peter, Vieira, Joana B., von Sikorski, Christian, Walker, Alexander Cameron, Watermeyer, Jennifer, Wetter, Erik, Whillans, Ashley, Willardt, Robin, Wohl, Michael J. A., Wójcik, Adrian Dominik, Wu, Kaidi, Yamada, Yuki, Yilmaz, Onurcan, Yogeeswaran, Kumar, Ziemer, Carolin-Theresa, Zwaan, Rolf A., and Boggio, Paulo S.

Published
2022
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20. Author Correction: National identity predicts public health support during a global pandemic

Author

Van Bavel, Jay J., Cichocka, Aleksandra, Capraro, Valerio, Sjåstad, Hallgeir, Nezlek, John B., Pavlović, Tomislav, Alfano, Mark, Gelfand, Michele J., Azevedo, Flavio, Birtel, Michèle D., Cislak, Aleksandra, Lockwood, Patricia L., Ross, Robert Malcolm, Abts, Koen, Agadullina, Elena, Aruta, John Jamir Benzon, Besharati, Sahba Nomvula, Bor, Alexander, Choma, Becky L., Crabtree, Charles David, Cunningham, William A., De, Koustav, Ejaz, Waqas, Elbaek, Christian T., Findor, Andrej, Flichtentrei, Daniel, Franc, Renata, Gjoneska, Biljana, Gruber, June, Gualda, Estrella, Horiuchi, Yusaku, Huynh, Toan Luu Duc, Ibanez, Agustin, Imran, Mostak Ahamed, Israelashvili, Jacob, Jasko, Katarzyna, Kantorowicz, Jaroslaw, Kantorowicz-Reznichenko, Elena, Krouwel, André, Laakasuo, Michael, Lamm, Claus, Leygue, Caroline, Lin, Ming-Jen, Mansoor, Mohammad Sabbir, Marie, Antoine, Mayiwar, Lewend, Mazepus, Honorata, McHugh, Cillian, Minda, John Paul, Mitkidis, Panagiotis, Olsson, Andreas, Otterbring, Tobias, Packer, Dominic J., Perry, Anat, Petersen, Michael Bang, Puthillam, Arathy, Riaño-Moreno, Julián C., Rothmund, Tobias, Santamaría-García, Hernando, Schmid, Petra C., Stoyanov, Drozdstoy, Tewari, Shruti, Todosijević, Bojan, Tsakiris, Manos, Tung, Hans H., Umbreș, Radu G., Vanags, Edmunds, Vlasceanu, Madalina, Vonasch, Andrew, Yucel, Meltem, Zhang, Yucheng, Abad, Mohcine, Adler, Eli, Akrawi, Narin, Mdarhri, Hamza Alaoui, Amara, Hanane, Amodio, David M., Antazo, Benedict G., Apps, Matthew, Ay, F. Ceren, Ba, Mouhamadou Hady, Barbosa, Sergio, Bastian, Brock, Berg, Anton, Bernal-Zárate, Maria P., Bernstein, Michael, Białek, Michał, Bilancini, Ennio, Bogatyreva, Natalia, Boncinelli, Leonardo, Booth, Jonathan E., Borau, Sylvie, Buchel, Ondrej, Cameron, C. Daryl, Carvalho, Chrissie F., Celadin, Tatiana, Cerami, Chiara, Chalise, Hom Nath, Cheng, Xiaojun, Cian, Luca, Cockcroft, Kate, Conway, Jane, Córdoba-Delgado, Mateo Andres, Crespi, Chiara, Crouzevialle, Marie, Cutler, Jo, Cypryańska, Marzena, Dabrowska, Justyna, Daniels, Michael A., Davis, Victoria H., Dayley, Pamala N., Delouvee, Sylvain, Denkovski, Ognjan, Dezecache, Guillaume, Dhaliwal, Nathan A., Diato, Alelie B., Di Paolo, Roberto, Drosinou, Marianna, Dulleck, Uwe, Ekmanis, Jānis, Ertan, Arhan S., Etienne, Tom W., Farhana, Hapsa Hossain, Farkhari, Fahima, Farmer, Harry, Fenwick, Ali, Fidanovski, Kristijan, Flew, Terry, Fraser, Shona, Frempong, Raymond Boadi, Fugelsang, Jonathan A., Gale, Jessica, Garcia-Navarro, E. Begoña, Garladinne, Prasad, Ghajjou, Oussama, Gkinopoulos, Theofilos, Gray, Kurt, Griffin, Siobhán M., Gronfeldt, Bjarki, Gümren, Mert, Gurung, Ranju Lama, Halperin, Eran, Harris, Elizabeth, Herzon, Volo, Hruška, Matej, Huang, Guanxiong, Hudecek, Matthias F. C., Isler, Ozan, Jangard, Simon, Jørgensen, Frederik J., Kachanoff, Frank, Kahn, John, Dangol, Apsara Katuwal, Keudel, Oleksandra, Koppel, Lina, Koverola, Mika, Kubin, Emily, Kunnari, Anton, Kutiyski, Yordan, Laguna, Oscar, Leota, Josh, Lermer, Eva, Levy, Jonathan, Levy, Neil, Li, Chunyun, Long, Elizabeth U., Longoni, Chiara, Maglić, Marina, McCashin, Darragh, Metcalf, Alexander L., Mikloušić, Igor, El Mimouni, Soulaimane, Miura, Asako, Molina-Paredes, Juliana, Monroy-Fonseca, César, Morales-Marente, Elena, Moreau, David, Muda, Rafał, Myer, Annalisa, Nash, Kyle, Nesh-Nash, Tarik, Nitschke, Jonas P., Nurse, Matthew S., Ohtsubo, Yohsuke, Oldemburgo de Mello, Victoria, O’Madagain, Cathal, Onderco, Michal, Palacios-Galvez, M. Soledad, Palomäki, Jussi, Pan, Yafeng, Papp, Zsófia, Pärnamets, Philip, Paruzel-Czachura, Mariola, Pavlović, Zoran, Payán-Gómez, César, Perander, Silva, Pitman, Michael Mark, Prasad, Rajib, Pyrkosz-Pacyna, Joanna, Rathje, Steve, Raza, Ali, Rêgo, Gabriel G., Rhee, Kasey, Robertson, Claire E., Rodríguez-Pascual, Iván, Saikkonen, Teemu, Salvador-Ginez, Octavio, Sampaio, Waldir M., Santi, Gaia C., Santiago-Tovar, Natalia, Savage, David, Scheffer, Julian A., Schönegger, Philipp, Schultner, David T., Schutte, Enid M., Scott, Andy, Sharma, Madhavi, Sharma, Pujan, Skali, Ahmed, Stadelmann, David, Stafford, Clara Alexandra, Stanojević, Dragan, Stefaniak, Anna, Sternisko, Anni, Stoica, Augustin, Stoyanova, Kristina K., Strickland, Brent, Sundvall, Jukka, Thomas, Jeffrey P., Tinghög, Gustav, Torgler, Benno, Traast, Iris J., Tucciarelli, Raffaele, Tyrala, Michael, Ungson, Nick D., Uysal, Mete S., Van Lange, Paul A. M., van Prooijen, Jan-Willem, van Rooy, Dirk, Västfjäll, Daniel, Verkoeijen, Peter, Vieira, Joana B., von Sikorski, Christian, Walker, Alexander Cameron, Watermeyer, Jennifer, Wetter, Erik, Whillans, Ashley, Willardt, Robin, Wohl, Michael J. A., Wójcik, Adrian Dominik, Wu, Kaidi, Yamada, Yuki, Yilmaz, Onurcan, Yogeeswaran, Kumar, Ziemer, Carolin-Theresa, Zwaan, Rolf A., and Boggio, Paulo S.

Published
2022
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31. Moral Narratives Workshop Proceedings

Author

Kim, Judy Sein, primary, Bennett, Jessica, additional, chen, janice, additional, Coman, Alin, additional, Currie, Gregory, additional, Dahlstrom, Michael, additional, De Brigard, Felipe, additional, Dennis, Amanda, additional, Dewey, Aliya, additional, Eden, Allison, additional, Fernández-Miranda, Gabriela, additional, Flores, Carolina, additional, Fowler, Zoe, additional, Fraser, Rachel, additional, Gantman, Ana P., additional, Green, Melanie C., additional, Hadjiandreou, Eliana, additional, Helton, Grace, additional, Heyman, Gail D., additional, Jordan, Jillian, additional, Karg, Simon Tobias, additional, Kronfeld, Maya, additional, Kukla, Quill, additional, Lackey, Jennifer, additional, Lagnado, David, additional, Lombrozo, Tania, additional, McLean, Kate C., additional, Pasupathi, Monisha, additional, Prosser, Annayah Miranda Beatrice, additional, Rea, Michael, additional, Rohde, Hannah, additional, Singh, Manvir, additional, Sinnott-Armstrong, Walter, additional, Walker, Alexander C., additional, Wodak, Ruth, additional, Wilkins, Lauren, additional, and Crockett, Molly, additional

Published
2023
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32. Semiparametric Allocation of Subjects to Cohort Strata.

Author

Walker, Alexander M., Russo, Massimiliano, Schneeweiss, Maria C., and Glynn, Robert J.

Abstract

Background: We illustrate a method for stratum assignment in small cohort studies that avoids modeling assumptions. Methods: Off-the-shelf software (rgenoud) made stratum assignments to minimize a loss function built on within-stratum and populationadjusted Euclidean distances. Results: In 100 trials using simulated data of 300 records with a binary treatment and four dissimilar covariate treatment predictors, minimizing a loss based on Euclidean distance reduced covariate imbalance by a median of 99%. Stratification by propensity score and weighting records by the inverse of their probability of treatment reduced imbalance by 76%-89% and 83%-94%, respectively. Loss minimization applied to a cohort of 361 children undergoing immunotherapy achieved nearly complete elimination of covariate differences for important treatment predictors. Conclusion: With the availability of semiparametric stratumassignment algorithms, analysts can tailor loss functions to meet design goals. Here, a loss function that emphasized covariate balance performed well under limited testing. [ABSTRACT FROM AUTHOR]

Published
2024
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35. A TGFβ-ECM-integrin signaling axis drives structural reconfiguration of the bile duct to promote polycystic liver disease

Author

Waddell, Scott H., primary, Yao, Yuelin, additional, Olaizola, Paula, additional, Walker, Alexander, additional, Jarman, Edward J., additional, Gournopanos, Konstantinos, additional, Gradinaru, Andreea, additional, Christodoulou, Ersi, additional, Gautier, Philippe, additional, Boerrigter, Melissa M., additional, Cadamuro, Massimiliano, additional, Fabris, Luca, additional, Drenth, Joost PH, additional, Kendall, Timothy J., additional, Banales, Jesus M., additional, Khamseh, Ava, additional, Mill, Pleasantine, additional, and Boulter, Luke, additional

Published
2023
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36. Indian Hedgehog release from TNF-activated renal epithelia drives local and remote organ fibrosis

Author

O’Sullivan, Eoin D., primary, Mylonas, Katie J., additional, Xin, Cuiyan, additional, Baird, David P., additional, Carvalho, Cyril, additional, Docherty, Marie-Helena, additional, Campbell, Ross, additional, Matchett, Kylie P., additional, Waddell, Scott H., additional, Walker, Alexander D., additional, Gallagher, Kevin M., additional, Jia, Siyang, additional, Leung, Steve, additional, Laird, Alexander, additional, Wilflingseder, Julia, additional, Willi, Michaela, additional, Reck, Maximilian, additional, Finnie, Sarah, additional, Pisco, Angela, additional, Gordon-Keylock, Sabrina, additional, Medvinsky, Alexander, additional, Boulter, Luke, additional, Henderson, Neil C., additional, Kirschner, Kristina, additional, Chandra, Tamir, additional, Conway, Bryan R., additional, Hughes, Jeremy, additional, Denby, Laura, additional, Bonventre, Joseph V., additional, and Ferenbach, David A., additional

Published
2023
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38. Stratified analysis in comparative effectiveness studies that emulate randomized trials.

Author

Htoo, Phyo T., Glynn, Robert J., Wang, Shirley, Paik, Julie M., Schneeweiss, Sebastian, Walker, Alexander M., and Patorno, Elisabetta

Abstract

Purpose: For observational cohort studies that employ matching by propensity scores (PS), preliminary stratification by consequential predictors of outcome better emulates stratified randomization and potentially reduces variance and bias through relaxed dependence on modeling assumptions. We assessed the impact of pre‐stratification in two real‐life examples. For both, prior evidence from placebo‐controlled randomized clinical trials (RCTs) suggested small or no risk reduction, but observational analysis suggested protection, presumably the result of confounding bias. Study Design and Setting: The study populations consisted of Medicare beneficiaries (2014‐18) with type 2 diabetes initiating either (i) empagliflozin versus dipeptidyl peptidase‐4 inhibitors (DPP‐4i) or (ii) empagliflozin versus glucagon‐like peptide‐1 receptor agonists (GLP‐1RA). The outcome was myocardial infarction or stroke. We estimated hazard ratios (HR) and rate differences (RD) after controlling for 143 pre‐exposure covariates via 1:1 PS matching after (1) PS estimation in the total cohort (total‐cohort PS‐matching) and (2) PS estimation separately by baseline cardiovascular disease (stratified PS matching). Results: Stratified PS matching resulted in HRs that exceeded those from total‐cohort PS‐matching by 13% and 9%, respectively, for the comparisons of empagliflozin to DPP‐4i and GLP‐1RA. Against both comparators, HRs and RDs after stratified PS matching were closer to the null, with slightly higher variances (2%–3%) than those after total‐cohort PS matching. Conclusion: Stratified PS matching produced effect estimates closer to the expected trial findings than total‐cohort PS matching. The price paid in increased variance was minimal. [ABSTRACT FROM AUTHOR]

Published
2024
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39. Beauty and truth, truth and beauty: Chiastic structure increases the subjective accuracy of statements

Author

Kara-Yakoubian, Mane, Walker, Alexander, Sharpinskyi, Constantine, Assadourian, Garni, Fugelsang, Jonathan, and Harris, Randy

Subjects
Beauty, Judgment, Humans, Experimental and Cognitive Psychology, General Medicine
Abstract

The Keats heuristic suggests that people find aesthetically pleasing expressions more accurate than mundane expressions. We test this notion with chiastic statements. Chiasmus is a stylistic phenomenon in which at least two linguistic constituents are repeated in reverse order, conventionally represented by the formula A-B-B-A. Our study focuses on the specific form of chiasmus known as antimetabole, in which the reverse-repeated constituents are words (e.g., “All for one and one for all;” A = all, B = one). In 3 out of 4 experiments (N = 797), we find evidence that people judge antimetabolic statements (e.g., “Success is getting what you want. Happiness is wanting what you get.”) as more accurate than semantically equivalent non-antimetabolic statements (e.g., “Success is getting what you wish. Happiness is wanting what you receive.”). Furthermore, we evaluate fluency as a potential mechanism explaining the observed accuracy benefit afforded to antimetabolic statements, finding that the increased speed (i.e., fluency) with which antimetabolic statements were processed predicted judgements of accuracy. Overall, the current work is consistent with the growing literature on stylistic factors biasing assessments of truth, using the distinctive stylistic pattern of antimetabole.

Published
2022

40. Management of Lobular Neoplasia Diagnosed by Core Biopsy

Author

Jani, Chinmay, primary, Lotz, Margaret, additional, Keates, Sarah, additional, Gupta, Yasha, additional, Walker, Alexander, additional, Al Omari, Omar, additional, Parvez, Arshi, additional, Patel, Dipesh, additional, Gnata, Maria, additional, Perry, John, additional, Khorashadi, Leila, additional, Weissmann, Lisa, additional, and Pories, Susan E., additional

Published
2023
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43. Tutors’ Responses to Student Disclosures: From “Suicidal Ideation” to “Feeling a Little Stressed”

Author

Walker, Alexander, Tait-McCutcheon, Sandi L, Gilbert, Amanda, Walker, Alexander, Tait-McCutcheon, Sandi L, and Gilbert, Amanda

Abstract

Tutors in higher education are receiving and responding to student disclosures that include racism, anxiety, loneliness, legal disputes, family upheavals, physical, emotional, and mental health, bereavement, legal battles, and harassment. In many cases, this caring aspect of the tutor role is not acknowledged, allocated time in job descriptions, or accurately remunerated. This qualitative study explored how tutors experienced and managed student disclosures, the personal and professional impact of responding to disclosures, and how tutors believed they could be better supported. Data was collected from two cohorts of participants tutoring at a University in Aotearoa New Zealand. using interviews and questionnaires and analysed by reflexive thematic analysis. Our findings showed that our participants believed they were positioned vulnerably between a rock and a hard place. At the rock, tutors were told to follow university guidelines and refer distressed students to over-loaded course coordinators or over-subscribed support services. At the hard place, tutors were often the first to be disclosed to, because of their front-facing positioning at the university and once they had heard the disclosure felt it was unethical not to try and help. Tutors believed they could assist students with personal challenges if their precarious positioning within the university was protected and strengthened and if appropriate support was provided by their university through training, time, and remuneration. Findings have implications for higher education providers to reconsider how tutors are supported to support students.

Published
2023

44. Heavy mineral exploration on a continental scale: The Geoscience Australia - Curtin University Heavy Mineral Map of Australia project

Author

McInnes, Brent I.A., De Caritat, Patrice, Walker, Alexander, and Bastrakov, Evgeniy

Subjects
indicator minerals, automated mineralogy, exploration, network analysis
Abstract

Heavy mineral techniques have been successfully used as exploration vectors to ore deposits around the world. However, heavy mineral exploration case studies and pre-competitive datasets relevant to Australian conditions are relatively limited. The Heavy Mineral Map of Australia (HMMA) project, part of Geoscience Australia's Exploring for the Future program, is addressing this gap by determining the abundance and distribution of heavy minerals (specific gravity >2.9 g/cm3) in 1,315 floodplain sediment samples obtained from Geoscience Australia's National Geochemical Survey of Australia (NGSA) project. Archived NGSA samples from floodplain landforms were sub-sampled and subjected to dense media separation and automated mineralogy assay using SEM-EDS analysis. A stage 1 data package released in July 2022 contained mineralogical assay data for 234 samples from the Darling- Curnamona-Delamerian (DCD) region of south-eastern Australia. A stage 2 data package for 188 samples within the Barkly-Isa-Georgetown (BIG) region of north-eastern Australia was released in December 2022. The massive number of mineral observations generated during the project (150 million mineral observations anticipated; 166 unique mineral species identified to date) required development of a novel Mineral Network Analysis (MNA) tool to allow end users to discover, visualise and interpret mineral co-occurrence relationships. The mapping function of the MNA tool can also be used to rapidly search the heavy mineral database for the purpose of exploration targeting. Stage 1 results revealed the co-occurrence of multiple Zn-minerals in drainages surrounding the Broken Hill Pb-Zn deposit. These Zn-minerals (e.g., gahnite (Zn-spinel) and ecandrewsite (Zn-ilmenite)) are interpreted to reflect high-grade metamorphism of base metal mineralisation. Zn-mineral co-occurrences were also observed in locations not associated with known mineralisation, and may represent new exploration opportunities. Demonstrating the heavy mineral data from both stage 1 and 2 releases using MNA will be the focus of this presentation. Mineral assay data from all 1,315 samples will be publicly released by the end of 2023., Open-Access Online Publication: May 29, 2023

Published
2023
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49. Vaccine Metaphors

Author

Gretton, Jeremy, Koehler, Derek, Fugelsang, Jonathan, Meyers, Ethan, Walker, Alexander, and Churchill, Sarah

Subjects
Behavioral Economics, Health Psychology, Cognition and Perception, Race, Social Psychology, Economics, Communication, Vaccination, COVID-19, Social and Behavioral Sciences, FOS: Psychology, Coronavirus, Health Communication, Medicine and Health Sciences, Metaphor, Psychology, Public Health, Vaccine
Abstract

Examining how metaphor used to describe COVID-19 vaccine process (development, approval, etc.) might influence relevant attitudes, beliefs, and behaviours.

Published
2022
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50. Vaccine Metaphors - Experiment 3

Author

Gretton, Jeremy, Koehler, Derek, Fugelsang, Jonathan, Meyers, Ethan, and Walker, Alexander

Subjects
Behavioral Economics, FOS: Psychology, Cognition and Perception, Social Psychology, Health Communication, Economics, Communication, Medicine and Health Sciences, Cognitive Psychology, Psychology, Public Health, Social and Behavioral Sciences
Abstract

Aiming to replicate effects of framing of COVID-19 vaccine development/distribution/approval (etc.) as a race vs. effort. Biggest study design changes are 1) rewording messages somewhat (e.g., trying to further emphasize speed/strength distinctions), 3) adding additional materials potentially impacted by metaphor (e.g., preference for prioritization of U.S. vs. global concerns in vaccine distribution), 4) adding 'prescriptive' questions as well as 'descriptive' questions, 5) removing control condition, and 6) removing non-essential covariate (Urbanicity)

Published
2022
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