Transfer of a response controlling stimulus duration across discrimination problems

In the acquisition phase, pigeons learned to peck at a changeover key to shorten the duration of S? but not of S+ presented on the food key in a discrimination problem. In the transfer phase, the significance of S+ and S? was changed through extinction of both, equal reinforcement, or discrimination reversal, while the changeover key was not available. Transfer tests then showed appropriate modification of the changeover response. Similar transfer was demonstrated across orthogonal stimulus dimensions. Further analytic studies showed that this transfer of the changeover response did not depend upon mediation due to differential response rates to the food key. This research strategy enriches the study of the “second learning process” by providing an indicator of stimulus control in all phases of the procedure. Direct transfer between different problems also indicates that discriminative stimuli, although physically dissimilar, have the same “psychological value” for the subject.     

The effect of scale modifications on the factorial dimensions and reliability of super's work values inventory

On the basis of previous research findings, 32 new items were added to Super's Work Values Inventory (WVI) and the resulting 77 item instrument was administered to 611 high school sophmores. Guttman's rank-reduction procedure and separate image analyses were employed to examine empirically the effects of additional items on hypothesized item groupings, scale intercorrelations, factorial dimensions, and scale internal consistency reliabilities. Analyses supported the addition of items to the WVI. It was found that the item groupings on the modified instrument were reasonable; the scale intercorrelations and factorial dimensions of both versions were highly comparable; the addition of items had increased the scale internal consistency reliabilities. Comments were made regarding counselors' use of the WVI.     

The effect of anxiety,reinforcement, and intelligence on the learning of a difficult task

The effects of anxiety, reinforcement, and intelligence were studied on the learning of a difficult task (paired associates with 1% association values) in 252 subjects studying in class IX in Chandigarh schools (mean age, 14.7 years). A 2 × 3 × 3 factorial design was used with two anxiety groups (high and low), three reinforcement conditions (praise, reproof, and praise + reproof), and three levels of intelligence (high, middle, and low). In general, the results were in line with the Sarasonian theoretical framework that anxiety shows its debilitating effects under certain conditions, but not all. At upper levels of intelligence, neither anxiety nor reinforcement was found significant. At lower levels of intelligence, anxiety was found to interfere with learning under all the reinforcement conditions. It was found further that the most affected group was the middle intelligencehigh anxiety group. This group performed better under praise than under praise + reproof and reproof alone.     

Word age-of-acquisition and lexical decision making

This paper reports two experiments concerning the effects of word age-of-acquisition and other word attributes on speed of lexical decision. Analyses of group average data indicated that word length, frequency and familiarity were the major determinants of decision speed. Previous reports of age-of-acquisition effects on lexical decision are attributed to failures to control for word familiarity.     

Fear of success,sex role attitudes,and career salience and anxiety levels of college women

This study examined, for 99 female undergraduate students, both the relationship between fear of success, sex role attitudes, and career salience, and the relationship between fear of success, career salience, and trait anxiety. Fear of success was assessed using the Fear of Success Scale, while sex role attitudes were assessed using the Attitudes towards Women Scale. Career Salience was measured by the Career Salience Scale, and trait anxiety was assessed by the trait subscale of the State-Trait Anxiety Inventory. The results indicated that fear of success and sex-role attitudes, in combination, significantly predicted the level of career salience in a multiple regression analysis. The women higher in fear of success and more traditional tended to be lower in career salience. Trait anxiety levels of women did not differ significantly as a function of fear of success, career salience, or the combination of the two.     

Analogical problem solving

The use of an analogy from a semantically distant domain to guide the problemsolving process was investigated. The representation of analogy in memory and processes involved in the use of analogies were discussed theoretically and explored in five experiments. In Experiment I oral protocols were used to examine the processes involved in solving a problem by analogy. In all experiments subjects who first read a story about a military problem and its solution tended to generate analogous solutions to a medical problem (Duncker's “radiation problem”), provided they were given a hint to use the story to help solve the problem. Transfer frequency was reduced when the problem presented in the military story was substantially disanalogous to the radiation problem, even though the solution illustrated in the story corresponded to an effective radiation solution (Experiment II). Subjects in Experiment III tended to generate analogous solutions to the radiation problem after providing their own solutions to the military problem. Subjects were able to retrieve the story from memory and use it to generate an analogous solution, even when the critical story had been memorized in the context of two distractor stories (Experiment IV). However, when no hint to consider the story was given, frequency of analogous solutions decreased markedly. This decrease in transfer occurred when the story analogy was presented in a recall task along with distractor stories (Experiment IV), when it was presented alone, and when it was presented in between two attempts to solve the problem (Experiment V). Component processes and strategic variations in analogical problem solving were discussed. Issues related to noticing analogies and accessing them in memory were also examined, as was the relationship of analogical reasoning to other cognitive tasks.     

Sign-tracking in aversive conditioning

Two experiments were conducted to determine if rats tend to avoid contact with a stimulus that signals the occurrence of shock and contact a stimulus that signals the nonoccurrence of shock. The conditioned stimulus was a 60-sec platform presentation, and the unconditioned stimulus was a 2-sec inescapable shock. In each experiment, the emphasis was on two types of Pavlovian pairings: forward pairing in which each platform presentation was followed by shock, and backward pairing in which each platform presentation was preceded by shock and followed by a lengthy shock-free interval. Experiment 1 showed that in comparison with Random and CS-only procedures, the backward procedure produced a significant increase in approach and contact with the platform, but the forward procedure failed to produce a significant decrease in contact with the platform. Experiment 2, in which all groups were roughly equated for baseline levels of platform preference, demonstrated strong effects of both forward and backward conditioning. The experiments provide evidence for an aversive sign-tracking system in which animals' tendencies to withdraw from or approach and contact a platform CS are determined by the Pavlovian contingencies which render it a reliable signal for the occurrence or nonoccurrence of shock.     

Feature analysis and the token test

In a picture-matching task pictures of objects had to be arranged into pairs by aphasic and nonaphasic patients and normal controls. Aphasic patients were also given the Token Test. Correlation between the rank order of error scores in both tests was highly significant in aphasic patients. The pictures were also given to a normal group for free matching. Overlapping of normal performance on free matching and aphasic performance on bound matching occurred. We hypothesized that aphasic impairment was due to a difficulty in calling up associations, difficulty in feature analysis, and in moving from one concept to another. These findings are discussed in the light of abilities needed for Token Test performance. The results indicate that the traditionally presumed fundamental difference between verbal and nonverbal cognitive tasks is rather unsatisfactory.