How the great apes (Pan troglodytes, Pongo pygmaeus, Pan paniscus, and Gorilla gorilla) perform on the reversed contingency task: the effects of food quantity and food visibility

S. T. Boysen and G. G. Berntson (1995) found that chimpanzees performed poorly on a reversed contingency task in which they had to point to the smaller of 2 food quantities to acquire the larger quantity. The authors compared the performance of 4 great ape species (Pan troglodytes, Pongo pygmaeus, Pan paniscus, and Gorilla gorilla) on the reversed contingency task while manipulating food quantity (0-4 or 1-4) and food visibility (visible pairs or covered pairs). Results showed no systematic species differences but large individual differences. Some individuals of each species were able to solve the reversed contingency task. Both quantity and visibility of the food items had a significant effect on performance. Subjects performed better when the disparity between quantities was smaller and the quantities were not directly visible.     

Working models of attachment and attribution processes in intimate relationships

Two studies examined the link between working models of attachment and social construal processes in romantic relationships. In Study 1, individuals high in attachment-related anxiety responded to hypothetical partner transgressions by endorsing relationship-threatening attributions, experiencing emotional distress, and endorsing behavioral intentions that were likely to result in conflict. These effects emerged after controlling for pessimistic explanatory style, depressed mood, and self-esteem. In addition, the association between anxiety and emotional distress was mediated by attributions and attachment-related needs. In Study 2, anxious individuals endorsed relationship-threatening attributions for their partner's transgressions but less so for their partner's positive behaviors, and these effects occurred primarily among those in unhappy relationships. In contrast, avoidant individuals endorsed pessimistic attributions for their partner's positive behavior but less so for their partner's transgressions, and these effects occurred regardless of their level of relationship satisfaction.     

The phenomenon of the tip of the tongue in aging

This paper presents new data on the tip of the tongue (TOT) phenomenon and its resolution in aging. 140 volunteers ranging from 19 to 82 years participated in an experiment using definitions about common names, proper names, adjectives and verbs to elicit TOTs. We studied the resolution of the TOTs introducing a free word-recall task and a priming task. Older adults experienced more TOTs than younger adults regardless of the level of vocabulary. Phonological priming, and not free recall of words, improved resolution for the older adults. The results are discussed in relation to the theory of the transmission deficit.     

Vocational choice and career planning. Spanish adaptation of Holland's Self-Directed Search (SDS-R)

The Self-Directed Search is a career-planning guide that works similarly to a vocational and professional interests inventory. A preliminary study allows detection of 68 ítems that need to be rectified, since they do not meet psychometric and semantic criteria. The current study demonstrates reliability and validity of the new adaptation. It is applied to a sample of 1460 subjects from different educational levels. As for reliability, the discrimination index of the items and internal consistency of the scales have improved. Additionally, procedures performed to verify validity (content, construct and concurrent) demonstrate that the instrument has acceptable validity. On balance, we can conclude that the instrument has sufficient scientific and technical credibility for application to the Spanish population.     

Evaluation of school-based child sexual abuse prevention program

The aim of the present work is to evaluate the efficacy of a program entitled "Prevention of child sexual abuse" the first structured program in Spain designed to prevent such risks. With this purpose, we carried out a study of 382 minors with ages ranging between 8 and 12 years. The result s show that the program has a very positive impact, increasing the awareness of the minors about this type of risk and improving their skills for coping with a possible event of sexual abuse. The efficacy of the program is also apparent, at the level of secondary prevention, in that it increased the likelihood that the children would reveal such events. Finally, exploration of the possible adverse effects of the program showed that the negative effects observed by parents and educators are negligible.     

The nature of residual cost in regular switch response factors

Two experiments are presented that compare the residual cost found when switching from one task to another under predictable conditions. The aim of the study was to explore the roles played by the stimulus, the response, or both in the process of the mental set reconfiguration necessary to switch between two tasks. The experiments tested [Rogers, R. D., & Monsell, S. (1995). Cost of a predictable switch between simple cognitive tasks. Journal of Experimental Psychology: General, 124, 207-231] stimulus-cued-completion hypothesis and [Schuch, S., & Koch, I. (2003). The role of response selection for inhibition of task sets in task shifting. Journal of Experimental Psychology: Human Perception and Performance, 29, 92-105] hypothesis of response selection as the key factor in the nature of switch cost. In the first experiment, two conditions were created that varied in terms of a Go/No-Go signal: The Go trials were a replication of [Tornay, F. J., & Milán, E. G. (2001). A more complete task-set reconfiguration in random than in predictable task switch. The Quarterly Journal of Experimental Psychology, 54A, 785-803 Experiment 3]; The No-Go trials were identical to the first condition, except that participants did not execute a response in the trial n-1 (Schuch & Koch, 2003). In addition, the percentage of Go and No-Go trials was manipulated. The results showed that the cost was significant only in the high Go signal-frequency case (Experiment 2), with an abrupt offset in Go trials and a gradual offset in No-Go trials. Based on the results of these experiments, it was concluded that the crucial factor to complete a mental set reconfiguration is response-related and not stimulus-related.     

Generalization of tacting actions in children with autism

This intervention compared the effects of two procedures on the generalization of a tacting repertoire (labeling) in 6 children with autism spectrum disorder. In one procedure the verbal antecedent stimulus “What is she doing?” appeared together with a person performing an action; in the other procedure, the antecedent stimulus was just the presence of the action. In initial tests, children emitted tacts only when the action was presented with the verbal antecedent. Thereafter, they learned to tact an action without the verbal antecedent and received tests to evaluate generalization to another action. Results indicated that in order to obtain generalization of tacting actions, it was necessary to learn to tact other actions without the verbal antecedent as well as learning to tact the action with the verbal antecedent. These findings have relevance for generalization of tacting actions from control by verbal antecedents to natural conditions and the production of spontaneous language.     

Endogenous testosterone concentration, mental rotation, and size of the corpus callosum in a sample of young Hungarian women

In the present study brain laterality, hemispheric communication, and mental rotation performance were examined. A sample of 33 women were tested for a possible linear relationship of testosterone level and mental rotation with structural background of the brain. Subjects with a smaller splenial area of corpus callosum tended to have lower levels of testosterone (r =.37, p<.05). However, there were no significant differences in mean scores of mental rotation of object and hand between groups with high and low levels of testosterone. There was a significant difference in relative size of the 6th area (slice) of the corpus callosum between groups with good and poor scores on mental rotation of an object and also in relative size of the 4th and 5th slices of the corpus callosum between groups on mental rotation of the hand. The good and poor scorers' show different relations with the measures of the corpus. The mental rotation of hand was associated with the parietal areas of the corpus callosum, while the mental rotation of object was associated only with the occipital area. These observations suggest that higher testosterone levels may be associated with a larger splenial area, which represents an important connection between the parieto-occipitocortical areas involved in activation of mental images. Further srudy is encouraged.