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Data sets on gameplay, called digital biomarkers, contain many characteristics of game players and are associated with mental health problems. In fact, an avatar's behavior during an online game is said to be related to its player's mental health. Based on this information, we estimated the depressive state of players based on their avatar's behavioral logs. There were 3,361 participants who were players of Pigg Party, a popular Japanese online game application. In April 2020, the players logged into the Pigg Party and answered a questionnaire on depression. In May 2020, of the 3,361 participants, 658 players again logged into the Pigg Party and answered the depression questionnaire. Their responses to the questionnaire and behavioral logs of Pigg Party for April and May comprised the data sets used in the study. The data set from April showed that individuals without depression were more likely to perform activities in a 24-hour cycle than individuals with depression. Furthermore, the popular model of the time series data set trained on the April data set predicted depression in the May data set with an accuracy of around 0.3 to 0.4. The results suggest that these models are difficult to predict for sparse time series data sets, such as the study's data set, and require refinement. [ABSTRACT FROM AUTHOR]

Japanese young adults' forms of address for their parents (e.g., Dad) reportedly demonstrate their respect for their parents. Such respect has been linked to young adults' interpersonal attitudes as well as depressive symptoms. Given these relationships, the present study identified possible links between young adults' forms of address for their parents, perceived parent-child relationships, interpersonal attitudes, and depressive symptoms. Participants were 226 Japanese college students. Young adults' disrespectful forms of address for parents were positively correlated with feelings of rejection and depressive symptoms. Furthermore, young adults' disrespectful forms of address for fathers predicted the adults' feelings of rejection and depressive symptoms, although there were no such relationships for disrespectful forms of address for mothers. These findings indicated that young adults' disrespectful forms of address for parents, especially fathers, were linked to their negative interpersonal attitudes and depressive symptoms. [ABSTRACT FROM AUTHOR]