Artificial life and Piaget

Artificial life provides important theoretical and methodological tools for the investigation of Piaget's developmental theory. This new method uses artificial neural networks to simulate living phenomena in a computer. A recent study by Parisi and Schlesinger suggests that artificial life might reinvigorate the Piagetian framework. We contrast artificial life with traditional cognitivist approaches, discuss the role of innateness in development, and examine the relation between physiological and psychological explanations of intelligent behaviour.     

Self-blame, self-efficacy, and adjustment to abortion

The causal impact of attributions and coping self-efficacy on adjustment to abortion was examined. Two hundred and eighty-three women were randomly assigned prior to their abortion to 1 of 3 counseling interventions: 1 designed to alter attributions for unwanted pregnancy (ATT-INT), 1 designed to raise coping expectations (EXP-INT), or a control (standard counseling) group. Depression, mood, anticipated consequences, and physical complaints were assessed postabortion. Women in the ATT-INT or EXP-INT group were better adjusted immediately postabortion than women in the control group. The EXP-INT group was also less depressed than the ATT-INT group. Three individual difference factors were also related to better adjustment: high coping self-efficacy, low self-character blame, and low other-blame. Self-efficacy also predicted adjustment 3 weeks postabortion. Implications for theories of adjustment to major life events, therapeutic interventions to assist coping with such events, and public policy on abortion are discussed.     

Processing idioms with multiple meanings

Three experiments are presented that examine understanding of idioms with one or more meaning. The results of Experiment 1 showed that subjects took longer to read and make paraphrase judgments for idioms when both their idiomatic and literal meanings are intended than it did to comprehend idioms meant only literally or idiomatically. In Experiments 2 and 3, subjects were faster at making phrase classification judgments for idioms with several different nonliteral interpretations than they were to make the same judgments for idioms with only one idiomatic interpretation. These findings suggest that idioms with more entries in the mental lexicon are accessed faster because it is more likely that one of their meanings will be encountered in a short time. The data overall support the idea that idioms are represented differently depending on their number of associated meanings.This research was supported by a Faculty Research Grant from the University of California, Santa Cruz. We wish to thank Dennis Johnston for his assistance in running subjects.     

Perceived social support, self-efficacy, and adjustment to abortion

Prior to their having a 1st trimester abortion, women's perceptions of social support from their partner, family, and friends and self-efficacy for coping were assessed. Depression, mood, physical complaints, and anticipation of negative consequences were measured after the 30-min recovery period. As predicted, perceived social support enhanced adjustment indirectly through its effects on self-efficacy. Women who perceived high support from their family, friends, and partners had higher self-efficacy for coping. Higher self-efficacy, in turn, predicted better adjustment on the psychological measures but not on the physical complaint measure. No direct path between social support and adjustment was observed. In addition, women who told close others of their abortion but perceived them as less than completely supportive had poorer postabortion psychological adjustment than either women who did not tell or women who told and perceived complete support.     

Gendered norms for family size, employment, and occupation: Are there personal costs for violating them?

The present study investigated gendered stereotypes involving women’s family size, employment, and occupation. Eleven ratings of targets’ social and personality characteristics were ascribed by 400 undergraduates to a hypothetical married woman described as voluntarily childfree or the mother of one, two, or eight children, and as nonemployed or employed either part or full time in either a gender-appropriate or gender-inappropriate occupation. Women employed in gender-atypical occupations were considered less expressive and were socially distanced, but this factor did not interact with family size. Two-children mothers were regarded favorably as was employment. Prior findings denigrating single-child mothers and glorifying eight-children mothers were not replicated—both groups were rated similar to normative, two-children mothers. Consistent with prior research, childfree women were evaluated least favorably. Findings suggest that norms regarding both family size (two children) and employment exist among contemporary college students. The authors thank Pauline Beres for her help with data collection and entry. This paper was presented at the meeting of the American Psychological Association in New York in 1995.     

Sex,wage-earner status,occupational level,and job satisfaction

This study attempted to investigate the relationship between wage-earner status, occupational level, and job satisfaction. It was proposed that wage-earner status was a more important determinant of job satisfaction than sex. However, the findings of this study suggested that sex was a more important determinant of job satisfaction than wage-earner status, and occupational level was a better predictor of job satisfaction than either sex or wage-earner status.     

Testing the reinforcing properties of S-: a replication of Lieberman''s procedure

A critical issue in testing theories of observing is whether the stimulus associated with extinction (the S-) reinforces observing responses. In previous experiments, subjects have been trained to make observing responses that produce both the S- and the stimulus correlated with reinforcement (the S+). Then, either the S+ or the S- has been withheld. Conflicting results have been attributed to differences among species. In the present experiments, pecking one key by master pigeons was reinforced with grain on a variable-ratio extinction schedule. Yoked pigeons received the grain on a variable-interval, extinction schedule controlled by the variable-ratio performances of the master birds. For both groups, concurrent pecking on a second key was reinforced on a variable-interval schedule with displays of discriminative stimuli. Subsequently, either the S+ or the S- was eliminated from the procedure. Omission of S+ produced a large decrease, as predicted by traditional conditioned reinforcement accounts of observing. By itself, S- did not maintain observing. A smaller and less reliable decrease, comparable to that obtained by Lieberman (1972) with rhesus monkeys, occurred when S- was eliminated. This replication with pigeons of Lieberman's results indicates that they are not species-specific, and the fact that observing was not maintained by S- alone suggests that the decrease obtained when S- was omitted is not attributable to the reinforcing power of S-.     

ACQUISITION AND GENERALIZATION OF COMPLIANCE WITH COMPLEX FIVE-COMPONENT INSTRUCTIONS1

A 7-yr-old bilingual boy of normal intelligence, judged by his school to be deficient in carrying out complex requests, was trained to comply with five-component instructions, e.g., “Give me/the chip/behind/the block/on blue”. Three interchangeable words or phrases were used for each component. Training proceeded in stages. First, the child was trained to identify all individual objects and actions; then to carry out requests involving only the first component, then the first two, then three, etc. On every trial, the visual setting permitted every possible response in the set. A test for generalization to nonreinforced instructions was given at each stage by giving no feedback for all instructions that included one preselected phrase. The phrase selected at each stage was one of the three that was introduced at that stage. As a further test for generalization, nonreinforced instructions were also given that included one additional component: the next to be trained (Probes Ahead). As a test for generalization across settings and instructions, several five-component instructions were presented each session in an unused classroom. These instructions used phrases, most of which were different from those being trained, and which referred to familiar classroom objects. Results showed: acquisition occurred for each stage of training, including the full five-component instruction; almost complete generalization of responding occurred to the subset of nonreinforced instructions; little or no generalization occurred to the Probes Ahead, where an additional untrained component was included; and little or no generalization was seen to the five-component classroom instructions, until training began on the five-component instructions in the training sessions. Performance was also examined for each component. Results showed that when a new component was introduced, correct performance to previously trained components declined, and was little if any superior to performance on the new component. In summary, transfer was found to untrained sentences of the same form as those being trained, even in another setting, where most of the components were different; but poor transfer was found to more complex sentences, and performance declined for previously trained components during training of a more complex sentence. Some features of the training procedure that may have affected the degree and form of transfer were discussed: the necessity for prior training in an appropriate response to the component phrases, the importance of intermixing of reinforced and nonreinforced trials, and the effects of the abruptness with which more complex sentence forms were introduced.     

Laboratory control of toe-sucking in a young rhesus monkey by two kinds of punishment

Both response-contingent withdrawal of a visual reinforcement and response-contingent presentation of an aversive stimulus (loud noise) were found to be effective in suppressing toe-sucking in a young rhesus monkey.     

Increased prevalence of sensing types in men with cluster headaches

To ascertain whether the percentage of men who suffer with cluster headaches and are classified as sensing types according to Jung's theory of psychological types was comparable to the percentage (74%) of Sensing types that was found by Gallagher, et al. among women who experience migraine headaches, the Myers-Briggs Type Indicator was administered to 25 male cluster-headache patients. There were 19 (76%) male Sensing types, and this was comparable to the percentage of Sensing types for migrainous women. The results are discussed as supporting previous contentions that Sensing types may be prone to developing psychosomatic symptoms related to stress.