Report on work in progress: “Towards a new science of the human”

A multidisciplinary and global study of the evolutionary process of the universe in general and mankind in particular is proposed, drawing from both modern science, approached by taking into consideration its various interdependent aspects; and the study of western and eastern ancient traditions, which prove to have a common foundation that is the comprehension and the control of the evolutionary process itself.

Such a study will lead to the compilation of a “Corpus Unus” of the new science of the human, a science which does not belong to a race, a culture or an age, but is specific to the human being as such.

Such a science will imply the exploration of mankind and of the evolutionary process, and applying the results in a pragmatic way to the betterment of human beings, society, and universe.     

Psychometric Properties of the Dyadic Parent-Child Interaction Coding System in The Netherlands

Abstract

The current study explored the psychometric properties of a parent-child interaction observation system, the Dyadic Parent-Child Interaction Coding System (DPICS) in the Netherlands. Participants included 31 Dutch mother-child dyads and 86?U.S. mother-child dyads for a community sample (2–7?years; 50% boys). Good one-week test-retest reliability was demonstrated among the Dutch sample. Similarities were found between Dutch and U.S. samples on most interaction codes, but mothers in the U.S. sample used more directive behaviors (e.g., commands) in some situations. Findings suggest that the DPICS is a reliable measure of mother-child interactions in the Dutch population. Cultural issues regarding the use of the DPICS are discussed.     

Are two heuristics better than one? The fluency and distinctiveness heuristics in recognition memory

Four experiments were conducted to test the impact of having multiple heuristics (distinctiveness and fluency) available during a recognition test. Recent work by Gallo, Perlmutter, Moore, and Schacter (Memory & Cognition 36:461–466, 2008) suggested that fluency effects are reduced when the distinctiveness heuristic can be applied to a recognition decision. In Experiment 1, we used a response reversal paradigm (Van Zandt & Maldonado-Molina Journal of Experimental Psychology: Learning, Memory, and Cognition 30:1147–1166, 2004) to demonstrate that participants transitioned from an early response strategy that was largely reliant on fluency to a later strategy in which the influences of fluency and distinctiveness were both observable. Experiments 2a, 2b, and 3 showed no evidence for reduction of the fluency heuristic after picture study when the test required a delayed response (Exp. 2a), confidence ratings (Exp. 2b), or the application of conceptual fluency (Exp. 3). The results are consistent with models of memory that assume that familiarity and recollection influence individual memory decisions Wixted (Psychological Review, 114:152–176, 2007).     

Contributions of dorsal striatal subregions to spatial alternation behavior

Considerable evidence has shown a clear dissociation between the dorsomedial (DMS) and the dorsolateral (DLS) striatum in instrumental conditioning. In particular, DMS activity is necessary to form action-outcome associations, whereas the DLS is required for developing habitual behavior. However, few studies have investigated whether a similar dissociation exists in more complex goal-directed learning processes. The present study examined the role of the two structures in such complex learning by analyzing the effects of excitotoxic DMS and DLS lesions during the acquisition and extinction of spatial alternation behavior, in a continuous alternation T-maze task. We demonstrate that DMS and DLS lesions have opposite effects, the former impairing and the latter improving animal performance during learning and extinction. DMS lesions may impair the acquisition of spatial alternation behavior by disrupting the signal necessary to link a goal with a specific spatial sequence. In contrast, DLS lesions may accelerate goal-driven strategies by minimizing the influence of external stimuli on the response, thus increasing the impact of action-reward contingencies. Taken together, these results suggest that DMS- and DLS-mediated learning strategies develop in parallel and compete for the control of the behavioral response early in learning.     

Testing a new cognitive behavioural treatment for obesity: A randomized controlled trial with three-year follow-up

It is remarkably difficult for people with obesity to maintain a new lower weight following weight loss. The aim of the present study was to examine the immediate and longer-term effects of a new cognitive behavioural treatment that was explicitly designed to minimise this post-treatment weight regain. One hundred and fifty female participants with obesity were randomized to the new treatment, behaviour therapy (the leading alternative psychological treatment) or guided self-help (a minimal intervention). Both of the main treatments resulted in an average weight loss of about ten percent of initial weight whereas weight loss was more modest with guided self-help. The participants were subsequently followed-up for three years post-treatment. The great majority regained almost all the weight that they had lost with the new treatment being no better than the behavioural treatment in preventing weight regain. These findings lend further support to the notion that obesity is resistant to psychological methods of treatment, if anything other than a short-term perspective is taken. It is suggested that it is ethically questionable to claim that psychological treatments for obesity “work” in the absence of data on their longer-term effects.     

Wanting to Be Boss and Wanting to Be Subordinate: Effects on Performance Motivation

Does dyad members' motivation to take on a high or low power position influence the dyad's performance motivation when assigned to hierarchical roles? Participants in 69 dyads (33 all‐women, 36 all‐men) indicated whether they preferred the high‐power role (owner of an art gallery) or the low power role (assistant to the owner). Power roles were then randomly assigned. The dyad's interaction during task solving was videotaped. Uninvolved coders rated performance motivation as the degree of quality of the superior's and the subordinate's task contributions and effort put into the task. Performance motivation was better if the boss preferred the high power to the low power role, irrespective of the subordinate's role preference. Leadership effectiveness is thus affected by the superior's power motivation.     

Developmental stimulation in child care centers contributes to young infants’ cognitive development

This study examined whether the quality of caregiver behavior in child care centers contributes to infant cognitive development at 9 months of age. Sixty-four infants (34 boys) were observed with their primary caregivers in child care centers at 3, 6, and 9 months of age. Caregiver behavior was rated for sensitivity and for stimulation of infant development during one-to-one caregiving interactions. Infant cognitive development was assessed using the Bayley Scales of Infant Development-II (Mental Development Index). Higher levels of developmental stimulation in the centers predicted higher levels of infant cognitive development at 9 months, beyond infant cognitive development at 3 months (just before entering child care), parental education, and maternal sensitivity. The results suggest that even small increases in developmental stimulation provided in child care centers in the first year of life may foster infants’ cognitive development.     

The Effects of Subtle Sexual Harassment on Women’s Performance in a Job Interview

Although we now know about the long-term consequences of moderate to severe sexual harassment, little is known about the immediate effects of more subtle harassment. The present study was designed to examine real-time consequences of subtle sexual harassment in a job interview using objective indicators of job performance. Fifty women were recruited for a job interview. Participants were randomly assigned to one of two interview conditions during which they were asked either three sexual or non-sexual questions interspersed with standard interview questions. In the former, women applicants spoke less fluently, gave lower quality answers, and asked fewer job relevant questions than did those in the non-sexual interview. It thus appears that even relatively mild harassment disrupts immediate performance.