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11 results on '"Martin, Amy L."'

3. Computer Proficiency for Online Learning: Factorial Invariance of Scores among Teachers

Author

Martin, Amy L., Reeves, Todd D., Smith, Thomas J., and Walker, David A.

Abstract

Online learning is variously employed in K-12 education, including for teacher professional development. However, the use of computer-based technologies for learning purposes assumes learner computer proficiency, making this construct an important domain of procedural knowledge in formal and informal online learning contexts. Addressing this concern, this study examined the score properties and invariance (N = 11,709) of an eight-item self-report measure of computer proficiency for online learning, the CPOL. Results from a confirmatory factor analysis suggest that the hypothesized unidimensional structure undergirded the instrument's scores, and invariance analyses suggested that the instrument functions similarly across teacher populations defined by gender, grade level taught, and age, and over time. Specifically, the results showed "strict" score invariance for all teacher groupings except for age. Discussed are potential proximal and distal applications of, and directions for future research concerning the CPOL.

Published
2016

4. Resilience of haplodiploids to being exploited by sexually deceptive plants

Author

Brunton‐Martin, Amy L, Gaskett, Anne C, Kokko, Hanna, University of Zurich, and Brunton‐Martin, Amy L

Subjects
education.field_of_study, Ecology, Obligate, Reproductive success, Evolution, fungi, Population, Zoology, Biology, Sperm, Sexual reproduction, 10127 Institute of Evolutionary Biology and Environmental Studies, 1105 Ecology, Evolution, Behavior and Systematics, Behavior and Systematics, Pollinator, Haplodiploidy, 570 Life sciences, biology, 590 Animals (Zoology), Mating, education, Ecology, Evolution, Behavior and Systematics
Abstract

In species with obligate sexual reproduction, scarcity of males can occasionally limit female reproductive success. It is unclear, however, whether this impacts population-level persistence. Sexually deceptive orchids attract mate-searching male insects who lose time, mating opportunities and may even become sperm depleted by mating with flowers. These insects are almost exclusively haplodiploid, and able to reproduce regardless of sperm availability – which might mitigate costs of deception. We model the population dynamics of deceived diploid or haplodiploid pollinators. The model reveals that haplodiploidy can enhance prospects for coexistence. If ‘sperm theft' by orchids is severe enough to generate unmated females in the local pollinator pool, this enhances the production of sons, which are subsequently available to act as pollinators. The mechanism relies on female haplodiploids being able to reproduce with or without sperm; this is absent in many diploid insects – where unmated females do not reproduce. We show that this gives haplodiploids an ability to maintain higher population densities, and to persist up to higher orchid densities, than diploids. Our model identifies the enhanced resilience of haplodiploid pollinators against deceptive exploitation as a possible reason why these systems have persisted.

Published
2021

8. Ordering our world: the quest for traces of temporal organization in autobiographical memory

Author

Skowronski, John J., Ritchie, Timothy D., Walker, W. Richard, Betz, Andrew L., Sedikides, Constantine, Bethencourt, Leslie A., and Martin, Amy L.

Subjects
Judgment -- Analysis, Recency effect (Memory) -- Analysis, Episodic memory -- Research, Event history analysis, Psychology and mental health, Sociology and social work
Abstract

The cognition of autobiographic events in relation to the life era of happening of these events is experimentally investigated. The order judgments of between era events are found to be rapid than the within-era events.

Published
2007

10. Feather colours of live birds and museum specimens look similar when viewed by seabirds.

Author

Brunton Martin, Amy L., Gaskett, Anne C., and Friesen, Megan R.

Subjects
COLOR of birds, SPECIES diversity, SPECIES distribution, AVIAN anatomy, FEATHERS
Abstract

Bird plumage and skin colour can be assessed from museum specimens. To determine whether these accurately represent the colours of live birds when viewed by birds themselves, we analysed the spectral reflectances of live and up to 100-year-old museum specimens of five seabird species (White-faced Petrel Pelagodroma marina, Common Diving Petrel Pelecanoides urinatrix, Grey-faced Petrel Pterodroma gouldi, Little Shearwater Puffinus assimilis and Fluttering Shearwater Puffinus gavia). Live birds had brighter colours than museum specimens, but there were no significant differences in the wavelengths reflected. Modelling indicated that seabirds would be able to detect colour changes in the skin, but not the feathers, of museum specimens, but only for species with blue or pink feet ( Pelecanoides urinatrix and Puffinus assimilis). For seabirds, museum specimens are adequate proxies for feather colour but not for skin colour. [ABSTRACT FROM AUTHOR]

Published
2018
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