HMS: A MATLAB simulator of the Harris model of associative learning

Harris (2006) recently proposed a new elemental model of the processes involved in associative learning. Although Harris explicated all relevant mathematical and conceptual details of the model in his article, implementing a computer simulation of his model requires considerable programming expertise and work. We therefore present the Harris model simulator (HMS), a MATLAB simulator of Harris's model. HMS provides a graphical user interface for manipulating all essential parameter values and for controlling the simulation process, the graphical visualization of the simulation course, and the numerical results. HMS is available free of charge from www.staff.uni-marburg.de/(tilde)lachnit/harris/. HMS allows researchers to easily derive and evaluate predictions for the Harris model, and it will therefore facilitate insights into the mechanisms of associative learning.     

When Is Dominance Related to Smiling? Assigned Dominance, Dominance Preference, Trait Dominance, and Gender as Moderators

We investigated gender and different types of dominance measures as potential moderators of the relation between dominance and smiling. We asked participants about their preference for either a dominant or a subordinate role (dominance preference), randomly assigned one of these roles to them (assigned dominance), and assessed trait dominance, felt dominance, and perceived dominance. Participants had two 8-min dyadic interactions in same-gender groups (33 all-women dyads, 36 all-men dyads), in which one was assigned to be the owner of an art gallery and the other was assigned to be the assistant to the owner. Interactions were videotaped, and smiling and perceived dominance were assessed on the basis of the videotapes. Both the particular dominance measure and gender moderated the relation between dominance and smiling. Results showed that for women in subordinate positions, those who wanted to be in a subordinate position smiled more than those who wanted to be in a dominant position. No such effect occurred for men and for participants in assigned dominant positions.     

Zooming into daily life: within-person associations between physical activity and affect in young adults

Objective: Negative affect in daily life is linked to poorer mental and physical health. Activity could serve as an effective, low-cost intervention to improve affect. However, few prior studies have assessed physical activity and affect in everyday life, limiting the ecological validity of prior findings. This study investigates whether daily activity is associated with negative and positive evening affect in young adults.

Design: Young adults (N = 189, Mdn = 23.00) participated in an intensive longitudinal study over 10 consecutive days.

Main Outcome Measures: Participants wore accelerometers to objectively assess moderate-to-vigorous physical activity continuously throughout the day and reported their affect in time-stamped online evening diaries before going to sleep.

Results: On days when participants engaged in more activity than usual, they reported not only less depressed and angry evening affect but also more vigour and serenity in the evening.

Conclusion: Young adults showed both less negative and more positive affect on days with more activity. Physical activity is a promising health promotion strategy for physical and mental well-being.     

Heart Rate Recovery After Exercise in Outpatients with Coronary Heart Disease: Role of Depressive Symptoms and Positive Affect

Heart rate recovery after 1 min of exercise cessation (HRR-1) is an important prognostic factor in patients with cardiovascular disease (CVD). We aimed to further elucidate the association between HRR-1 and known psychosocial risk factors in patients referred for comprehensive cardiac rehabilitation. We examined 521 patients with coronary heart disease in the first week of an outpatient cardiac rehabilitation program. Depressive and anxiety symptoms were measured with the Hospital Anxiety and Depression Scale, and positive (PA) and negative affect were rated with the Global Mood Scale. Depressive symptoms showed a significant inverse relationship with HRR-1 (p?<?.05), controlling for sociodemographic and medical covariates, whereas anxiety symptoms did not show a significant association. PA made a significant contribution to HRR-1 as well (p?<?.05). Our findings suggest an independent association between HRR-1 and psychosocial risk factors of CVD.     

When Reminiscence is Harmful: The Relationship Between Self-Negative Reminiscence Functions,Need Satisfaction,and Depressive Symptoms Among Elderly People from Cameroon,the Czech Republic,and Germany

Reminiscence has various functions, not all of which are beneficial for well-being. In particular, self-negative reminiscence functions—boredom reduction, bitterness revival, and intimacy maintenance—have been shown to be associated with reduced well-being. The present paper examines the link between self-negative reminiscence functions and depression in three cultural contexts. We hypothesize that both variables are indirectly linked via satisfaction of basic psychological needs: Self-negative reminiscing is associated with an impairment of need satisfaction which in turn relates to enhanced depressive symptoms. This hypothesis is tested in elderlies from Cameroon, the Czech Republic, and Germany. A total of 637 elderly participants reported on self-negative reminiscing, need satisfaction, and depressive symptoms. Analyses indicate that for boredom reduction and bitterness revival an indirect effect on depression via decreased need satisfaction can be established in all cultural contexts. For intimacy maintenance, a different picture emerges in that in the Czech and the German sample, there was a direct effect on depression but not an indirect one via need satisfaction. Yet, among Cameroonian participants an indirect effect was found, demonstrating that intimacy maintenance was related to decreased depression via enhanced need satisfaction. These results suggest that reminiscence functions may have partly universal, partly culture-specific effects on well-being.     

The development of children’s early memory skills

A multitask battery tapping nonverbal memory and language skills was used to assess 60 children at 18, 24, and 30 months of age. Analyses focused on the degree to which language, working memory, and deliberate memory skills were linked concurrently to children’s Elicited Imitation task performance and whether the patterns of association varied across the different ages. Language ability emerged as a predictor of immediate Elicited Imitation performance by 24 months of age and predicted delayed performance at each age. In addition to the contributions of language, children’s abilities to search for and retrieve toys in the deliberate memory task were associated with their immediate Elicited Imitation performance at each age. In addition to language, working memory was positively associated with aspects of both immediate and delayed performance at all ages. The extent to which it was possible to replicate and extend previous cross-sectional work in this longitudinal study is discussed.     

Semantic Challenges to Scientific Realism

This paper is concerned with connections between scientific and metaphysical realism. It is not difficult to show that scientific realism, as expounded by Psillos (1999) clearly qualifies as a kind of metaphysical realism in the sense of Putnam (1980). The statement of scientific realism therefore must not only deal with underdetermination and the dynamics of scientific theories but also answer the semantic challenges to metaphysical realism. As will be argued, the common core of these challenges is the proposition that a (metaphysical) realist semantics leads to semantic agnosticism in the sense that we are unable to grasp the proper meanings and referents of our linguistic expressions. Having established this, I will focus more specifically on the question of whether scientific realism—in its state-of-the-art account—has the resources to make reference to scientific concepts intelligible such that the semantic challenges can be answered.     

Gender differences in memory for the appearance of others

Five studies investigated gender differences in the accurate recall of the appearance of others. The greater interpersonal orientation and interpersonal sensitivity of women were predicted to give women an advantage over men in appearance accuracy. Under both directed- and incidental-learning conditions, women more accurately recalled information concerning the appearance of their social targets than did men, participants' memory for the appearance of female targets was more accurate than it was for male targets, and neither gender was found to be a relative advantage in recalling the appearance of same-gender targets. The motivational and knowledge-based factors that might underlie a gender difference in appearance accuracy are discussed.     

Anybody can be a boss but only certain people make good subordinates: behavioral impacts of striving for dominance and dominance aversion

The present study investigated whether people in assigned subordinate or dominant roles differ in their dominance behavior according to whether they initially wanted a subordinate or a dominant role. Sixty-six females and 72 males interacted twice for 8 mins in same-gender dyads. Prior to the interaction, participants could indicate whether they preferred to take a subordinate or a dominant role. Roles were then assigned randomly. Both interactions were videotaped and later coded for perceived dominance and speaking time. Results showed that for assigned subordinates, those who initially wanted to be in the dominant position were perceived as more dominant and behaved more dominantly than those who initially wanted to be in the subordinate role. For assigned high-dominance people, there was no difference in perceived dominance and behavioral dominance between those who initially wanted the dominant versus subordinate position.     

Computationally constructing a repository of compound remote associates test items in American English with comRAT-G

The Remote Associates Test (RAT) has been used to measure creativity, however few repositories or standardizations of test items exist, like the normative data on 144 items provided by Bowden and Jung-Beeman. comRAT is a computational solver which has been used to solve the compound RAT in linguistic and visual forms, showing correlation to human performance over the normative data provided by Bowden and Jung-Beeman. This paper describes using a variant of comRAT, comRAT-G, to generate and construct a repository of compound RAT items for use in the cognitive psychology and cognitive modeling community. Around 17 million compound Remote Associates Test items are created from nouns alone, aiming to provide control over (i) frequency of occurrence of query items, (ii) answer items, (iii) the probability of coming up with an answer, (iv) keeping one or more query items constant and (v) keeping the answer constant. Queries produced by comRAT-G are evaluated in a study in comparison with queries from the normative dataset of Bowden and Jung-Beeman, showing that comRAT-G queries are similar to the established query set.