The biological function of Pavlovian conditioning: Learned inhibition of aggressive behavior in territorial fish

Following Pavlovian discrimination training, stimuli predicting the appearance of a territory intruder (an excitatory conditional stimulus, CS+) or the absence of that event (an inhibitory conditional stimulus, CS−) were presented to pairs of territorial male fish immediately before their first aggressive interaction. Pairmates that both received excitatory stimuli prior to the confrontation were significantly more aggressive than a control group which received the same training but which received neither a CS+ nor a CS− in the test. Pairmates in which both received a CS− were significantly less aggressive than the control group. In these three groups, no differences in aggression were observed between the individual members of a single pair. Two additional groups were composed of pairs whose members received different stimuli prior to the test. Although no differences were found between pairmates in the group in which one member received a pretest CS− while the other member received no stimulus presentation, large differences in aggressive behavior were obtained when one fish received a CS+ and its pairmate received a CS−. We discuss the behavioral ecology of terriorial behavior in fish and attempt to show the potential importance of these results in this naturalistic context. In addition, we discuss the implications of an ecological approach for causal analyses of inhibitory learning.     

The attribution of arousal and emergency helping: A bidirectional process

J. M. Piliavin, J. A. Piliavin, and J. Rodin (1969, Journal of Personality and Social Psychology, 13, 289–299) and J. A. Piliavin, J. F. Dovidio, S. L. Gaertner, and R. Clark (1981, Emergency intervention, New York, Academic Press) proposed that physiological arousal is causally related to a bystander's response to an emergency. Examining this proposition, the current research investigated the hypothesis that residual arousal from an extraneous event has the capacity to facilitate as well as to inhibit bystander intervention during an emergency depending on whether the extraneous arousal is attributed to the emergency or whether the emergency-generated arousal is attributed to the extraneous event. Specifically, it was predicted that during an Unambiguous emergency, extraneous arousal from the prior performance of physical exercise would be attributed to the emergency and thus facilitate bystander responsiveness. During an Ambiguous emergency, however, emergency-generated arousal would be attributed to the prior performance of physical exercise and thus bystander responsiveness would be inhibited by higher levels of arousal. Fifty-four male subects performed no, moderate, or high levels of exercise before exposure to an Unambiguous or Ambiguous emergency. Results indicated that during the Unambiguous emergency, higher levels of prior exercise facilitated helping. However, when the emergency was Ambiguous, high levels of exercise tended to inhibit bystander responsiveness. Correlational analysis of telemetered heart rates and latency to intervene corroborated the above pattern of findings.     

Misattribution of arousal and attraction: Effects of salience of explanations for arousal

Based on previous research demonstrating that salience of a plausible cause increases the likelihood of causal attribution (S. E. Taylor & S. T. Fiske, in J. Berkowitz (Ed.), Advances in Experimental Social Psychology (Vol. 11), New York: Academic Press, 1978) it was predicted that salience of plausible causes of arousal would affect romantic attraction. Male subjects were differentially aroused by running in place. Aroused subjects were particularly likely to be attracted to an attractive female confederate if they expected to meet her (high salience of confederate) and if cues associated with the running in place were minimized (low salience of exercise). Though results are consistent with a misatribution of arousal hypothesis, it is suggested that emotion schemata are a potentially more useful explanation.     

Need fulfillment in the career development of women

To test Harmon's proposal that Maslow's needs theory can explain differences in women's career decisions, need importance scores of 481 college graduate women of 1968 were contrasted. Since full-time homemakers are dependent upon another person for fulfillment of basic needs (Maslow's security-safety and social needs), it was hypothesized that these needs would remain prepotent and, therefore, would be higher for homemakers than for women employed outside the home. Esteem and self-actualization needs of employed women were expected to be higher for employed women than for homemakers. The results of the analyses generally supported the hypotheses. The major resulting discriminant function contrasted negative weights on basic needs with positive weights on high-level needs. Homemakers scored highest on security-safety and social needs, while professional-managerial and clerical-sales workers scored highest on the esteem need. In an unexpected finding, self-actualization was found to be the highest-ranked need for all groups of women in the study.     

The scanning of compound figures by young infants

We studied infants' scanning of two compound stimuli, in each case by presenting features inside a frame, the frame alone, and the features alone. One stimulus was composed of squares and was like that studied by P. Salapatek (in L. Cohen & P. Salapatek (Eds.), New York: Academic Press, 1975); the other was a schematic face. Newborns and 1-month-olds looked at the small square when it was presented alone, but rarely looked at it when it was framed by the larger square. In contrast, 2-month-olds looked at the small square for long periods whether or not it was framed. However, when newborns and 1-month-olds were shown a schematic face, they looked at its internal features at least half the time. Thus, young infants show no external bias when scanning a schematic face.     

Occupational perceptions of academic disciplines

This study investigated the way in which various academic disciplines are viewed by students with respect to their “specificity,” i.e., the degree to which each is related to all occupations after graduation, and their “utility,” i.e., the extent to which each facilitates obtaining employment after graduation. A consensus concerning the specificity and utility of 17 academic disciplines was found for a sample of 485 sixteen- to eighteen-year-olds. This consensus was reliably demonstrated on other independent samples; nevertheless, some differences between individual disciplines were found as a function of sex and type of school attended.     

Conflict and integration in career decision schemes

This study investigates three aspects of the way high school seniors (166 males, 187 females) construe occupational alternatives: intensity (how strongly are career considerations related), conflict (how much conflict is involved in these relations), and evaluative accord (to what extent are one's stated preferences in agreement with the positivity with which occupations are rated on considerations). Using a variant of G. Kelly's (New York: Norton, 1955) grid methodology, students rated 10 career alternatives on 10 career considerations. The results indicate that the three variables are significantly interrelated.     

Patterns of cerebral organization

An analysis of the concurrent incidence of aphasia and spatial disorder in 270 patients with unilateral brain damage suggests that the two functions are statistically independent. These data can also be used to estimate the distribution of left, right, and bilateral representation of linguistic and spatial functions in the population. In right-handers, sex affects the pattern of cerebral asymmetries, while the familial history of sinistrality has a stronger effect on the pattern of cerebral asymmetries in left-handers. These findings suggest that complementary specialization exists only as a statistical norm: It is suggested that differences in complementary and noncomplementary specialization may underlie individual differences in cognitive skills.