The role of understanding in solving word problems

Word problems are notoriously difficult to solve. We suggest that much of the difficulty children experience with word problems can be attributed to difficulty in comprehending abstract or ambiguous language. We tested this hypothesis by (1) requiring children to recall problems either before or after solving them, (2) requiring them to generate final questions to incomplete word problems, and (3) modeling performance patterns using a computer simulation. Solution performance was found to be systematically related to recall and question generation performance. Correct solutions were associated with accurate recall of the problem structure and with appropriate question generation. Solution “errors” were found to be correct solutions to miscomprehended problems. Word problems that contained abstract or ambiguous language tended to be miscomprehended more often than those using simpler language, and there was a great deal of systematicity in the way these problems were miscomprehended. Solution error patterns were successfully simulated by manipulating a computer model's language comprehension strategies, as opposed to its knowledge of logical set relations.     

Dogfighting: Symbolic Expression and Validation of Masculinity

This study examines the issue of masculinity indogfighting. Dogfighting is an illegal gaming sportcentered in the Southern United States. The data for thisstudy were obtained via ethnographic fieldwork over a period of two years. Interviews wereconducted with 31 dogmen, approximately 90% of whom werewhite males. In addition the authors attended 14dogfights and numerous pre-fight meetings. We argue that specific elements of this sport representsymbolic attempts at attaining and maintaining honor andstatus, which, in the (predominantly white, male,working-class) dogfighting subculture, are equated with masculine identity. We further argue thatpursuit of symbolic masculinity through dogfighting ismore important to working-class men, who possess feweralternative avenues for achieving status than do middle-class or professional men. Theimplications of this research for the larger culture ofmasculinity in the United States are alsoexplored.     

Memory-basedsame-different conceptualization by pigeons

We first trained pigeons to peck one button (same) after the successive presentation of 16 identical pictures and to peck a second button (different) after the successive presentation of 16 nonidentical pictures. Later, we tested the birds with other lists ofsame anddifferent items composed of completely novel pictures. Accuracy to the testing lists reliably exceeded chance levels, thus demonstratingsame-different conceptualization by pigeons under conditions that, for the first time, (1) eliminated purely perceptual mechanisms of discrimination learning and transfer and (2) required memory-based processing of the experimental stimuli.     

The development of evidence evaluation skills

To assess developmental differences in evidence evaluation skills, 77 second- and third-grade students, 85 sixth- and seventh-grade students, 36 non-college-educated adults, and 40 college students were presented with four data sets depicting plants grown by each of four people. The data sets presented a perfect positive or zero correlation between plant health and the presence or absence of one variable, believed by participants to have a causal influence on growing healthy plants, or another, believed to have no causal influence. In each of three missing data conditions, the data sets depicted instances in which the status of the variable, outcome, or both were unknown in addition to the contingency data. After each data set was presented, participants judged (and justified) the causal status of the variable. Although demonstrating a basic competence, the two groups of children were more strongly influenced by prior beliefs and missing data than were the two adult groups. There were also age or educational differences in participants' tendency to justify judgments on the basis of the contingency data. The implications of the results for conceptualizing the continuity or discontinuity of children's, adults', and scientists'evidence evaluation skills are discussed.     

Nutritional misinformation of children: A developmental and experimental analysis of the effects of televised food commercials

This study assessed the accuracy of judgments of 100 school age children as to the presence of real fruit content in 3 sets of cereals and beverages advertised on TV: real fruit, nonfruit, and artificially fruit flavored products. In the baseline session, accuracy was an increasing function of age, but children at each age were deceived about real fruit content of artificial fruit products. In session 2, the experimental group saw TV ads for 6 products embedded in a program (naturalistic viewing). They then judged fruit content for these six advertised products, plus a matched set of six for which ads were not shown. Controls saw toy ads on TV, and then judged the same 12 products. In session 3, subjects in each group saw the same ads they had seen in Session 2, without the program and with instruction to attend very carefully to messages in the ad (intensive viewing). They then judged all 12 products again. After naturalistic viewing, few significant differential changes from baseline were found. But after intensive viewing, accuracy of judgment of advertised artificial fruit products was lower than baseline among experimental group children. By contrast, accuracy was higher than baseline both for control children's judgements of “advertised” prod-     

Reminiscence as Continuity: Comparison of Young and Older Adults

This study empirically investigates key propositions of a continuity theory approach to reminiscence. According to continuity theory, individuals seek familiarity in the face of uncertainty or impending change, which can accompany the aging process. The reminiscence behavior of young (n = 43) and older (n = 47) adults was compared to ascertain whether significant differences would emerge between the two populations concerning how often they reminisce and their use of reminiscence during transitional periods. Also of interest were differences in potential links between the content of reminiscence episodes and postreminiscence affect. Young adults in this sample reminisced significantly more frequently than older adults and were more likely to reminisce during times of change than were older adults. In addition, there was a direct relationship between the content of reminiscence episodes and postreminiscence affect, with older adults reporting greater emotional satisfaction after recalling the past than did younger adults. Findings lend support to continuity theory: Reminiscence occurs throughout the life span and should not be conceptualized as occurring most frequently in old age.     

Marital Status and Sex: Impact on Career Self-Efficacy

Bandura's (1977, 1986) self-efficacy theory served as the theoretical framework for examining the preferences of 214 individuals for either traditionally male or traditionally female occupations. An interaction between sex and marital status was found with regard to efficacy for traditionally female occupations. Married women scored higher than did married men, and unmarried women scored higher than did unmarried men for the traditionally female occupations. No difference between married and unmarried men or between married and unmarried women was indicated for the traditionally female occupations. A significannt main effect of sex, with men scoring higher than women, was found for both the traditionally male and traditionallyfemale occupations. Implications for further research as well as for career counseling and development are discussed.