Human reasoning: Some possible effects of availability

This paper discusses some possible ways in which the availability heuristic (Tversky and Kahneman, 1973) may mediate subjects' responses to experimental ‘reasoning’ tasks. A brief review of some effects of availability in other areas is given and then the application of availability to reasoning data is considered with respect to problems employing both ‘thematic’ and ‘abstract’ content.In the case of thematic content, it is argued, with reference to a variety of studies, that to produce a differential effect (to abstract content), the content must provide available cues, resulting from the subjects' experience. Differential effects of content are thus interpreted as differential effects of availability. When abstract content is used, there are cues available from the experimental situation itself, and it is shown that several known error tendencies readily lend themselves to an explanation in terms of availability.In the final section, it is pointed out that a focus on available cues, rather than logical structure, provides a psychological, rather than logical, approach to human reasoning. It is argued that a bias may be psychologically, although not logically, optimal in that it may often produce correct responses in ‘real life’. Accordingly, the possible real life utility of availability is considered, and several ways in which the bias may lead to usually correct decisions are discussed. Given this, it is argued that availability is an effective heuristic and that observed biases on a range of experimental tasks may thus be interpreted as resulting from the application of a behavior that is optimal within the limits of human cognition. However, it is concluded that limitations in both deterministic and probabilistic problem solving may lead to a consistent, but erroneous, view of the world.     

Differential effectiveness of explicit verbal feedback on children's communication skills

In order to specify by which combination of content and form dimensions the explicit verbal feedback comes to be most effective in enhancing communication skills, a training experiment was designed where both dimensions were factorially manipulated. Forty children (mean age, 5–10) were randomly assigned to one of four treatment conditions: Interrogative Cognitive feedback, Declarative Cognitive feedback, Interrogative Perceptual feedback, and Declarative Perceptual feedback. The Cognitive type of feedback specified the successive cognitive steps underlying the comparison activity whereas the Perceptual type of feedback stressed only the necessity of describing perceptual differences when communicating. These two contents of feedback were either provided by a set of standardized questions or of declarative statements, after each trial of a speaking training task. Subjects were given a pretest, and immediate and delayed posttests comprised of a speaking task and a listening generalization task. A 2 (Contents) × 2 (Forms) × 2 (Tasks) × 2 (Post-tests) analysis of variance showed that all subjects performed significantly better on the speaking task than on the listening generalization task and that subjects in the Interrogative Cognitive condition performed better than subjects in the three other conditions, on both post-test tasks. Results emphasize the mutual facilitating effects of the Interrogative Form and the Cognitive Content of explicit feedback and are discussed in terms of the generalization and stability of the induced learning.     

Capacity increase and chunking in the development of short-term memory

The possibility of an age-related increase in the capacity of the short-term store was examined in two short-term memory experiments, and an M-operator model was proposed to account for the data. In the first experiment, lists of 8, 10, and 12 consonants were presented to 10-, 12-, and 14-year-olds. Despite the fact that the amount of chunking was monitored and kept constant across ages, there was a definite developmental increase in short-term memory performance. The size of the increase corresponded to the prediction of Pascual-Leone's M-operator theory. An M-operator model was proposed to account for the relation between performance level and list length at each age, as well as the developmental increase. Predictions of adult performance were tested in a second experiment. Together the two experiments show that an important part of short-term memory development can be explained as a growth in short-term store capacity.     

Academic examinations and anxiety: The interaction model empirically tested

The person-by-situation interaction model of anxiety was tested in the reallife setting of an academic examination. Twenty-eight male and 79 female university students served as subjects. State anxiety (A-State) was assessed just prior to the examination (Trial 2) and approximately 1 week before (Trial 1) and after (Trial 3) the examination. Five facets of trait anxiety (A-Trait) were measured in a nonstressful situation 1 week prior to the examination. The subject's cognitive appraisal of the various situations was assessed by a self-report index of the type and degree of threat involved in the situation just experienced. As predicted, a significant A-Trait-by-situation interaction in eliciting A-State was observed for social evaluation A-Trait. There were no interactions for the other, noncongruent facets of trait anxiety. The results also indicated that individuals' perception of situations may be the most important factor affecting reactions to stressful situations. In general, the results were interpreted as providing support for the multidimensionality of A-Trait and further validation of the interaction model of anxiety.     

Critical words and the locus of stuttering in speech

The locus of stuttering in the communicative speech of 26 stutterers was studied in situations where subjects received and conveyed specific information. It was hypothesized that a larger proportion of critical rather than noncritical words would be stuttered. Critical words were those which necessarily had to be pronounced if a listener should be able to understand and act according to the messages given. The critical words were selected by the experimenter before the experiment started. The results showed that 35.8% of the critical and 8.4% of the noncritical words were stuttered. There was also significantly more stuttering on critical words than on long noncritical words. The largest proportion of critical words appeared in the final position of sentences, which was also where most stuttering was located. Whole-word repetitions, an instance of normal nonfluency, were associated with noncritical words. No correlation between frequency of stuttering and whole-word repetitions was found.     

Paternal correlates of adolescents' running away behaviors: Implications for adolescent development and considerations for intervention and treatment of adolescent runaways

In recent years, research concerned with deviance in adolescent behaviors has become increasingly focused on the extent to which fathers influence their children's development. The present study, using an interdependent and mediational model of parent-child correlates, examined the interrelationships between father personality attributes and adolescents' running away behaviors. Two hundred adolescents (96 males; 104 females) from lower middle class homes and their fathers cooperated in the study. Findings showed that there are specific father attributes and socialization characteristics and adolescent personality attributes which interact significantly to influence adolescents' running away behaviors. Specific predictors of male and female adolescents' running away were examined and identified by means of discriminant function analyses. The results were interpreted within the framework of a mediational model. Implications of the findings were discussed for adolescent development and intervention programs for adolescents and their fathers.     

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.     

Sex differences in restoring justice: The down payment effect

It was proposed that harmdoers who psychologically suffer (e.g., experience remorse, guilt) through victimizing another will be viewed as having already taken a step toward righting the injustice caused the victim. Consequently, they should be asked to make fewer reparations and assigned a lesser fine than those harmdoers who do not express guilt or remorse. Male and female subjects read scenarios depicting an accident in which the harmdoer either admitted or did not admit responsibility (Experiment 1) or expressed various degrees of remorsefulness (Experiment 3). Both investigations indicated that a show of remorse or of a remorseful gesture (i.e., assuming responsibility) can partially vindicate harmdoers by requiring them to make fewer reparations to a victim (Experiment 1) or pay less of a fine (Experiment 3) among females only. Thus psychological damages incurred in a wrongful act can serve as a “down payment” toward restoring justice. In corroboration with these findings of sex differences, Experiment 2 revealed that females consider to a greater extent than males reasons such as a harmdoer's feelings when assigning a fine.     

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.