A componential model for mental addition

A componential model capable of representing simple and complex forms of mental addition was proposed and then tested by using chronometric techniques. A sample of 23 undergraduate students responded to 800 addition problems in a true-false reaction time paradigm. The 800 problems comprised 200 problems of each of four types: two single-digit addends, one single- and one double-digit addend, two double-digit addends, and three single-digit addends. The results revealed that the columnwise product of addends, a structural variable consistent with a memory network retrieval process, was the best predictor of mental addition for each of the four types of problem. Importantly, the componential model allowed estimation of effects of several other structural variables, e.g., carrying to the next column and speed of encoding of digits. High levels of explained variance verified the power of the model to represent the reaction time data, and the stability of estimates across types of problem implied consistent component use by subjects. Implications for research on mental addition are discussed.     

Prejudice Toward Contemporary Outgroups as a Generalized Attitude

The interrelatedness of attitudes toward homosexuals, Blacks, women, and old people was studied, as well as attitude differences on demographic variables. Three hundred and nine White undergraduates responded to the Homosexual Attitude Scale, The Attitudes Toward Women Scale, Multifactor Racial Attitude Inventory, and two attitudes toward old people scales. Nine of the ten possible intercorrelations were significant beyond the .01 levels. Prejudice toward quite distinct outgroups appears to be a generalized attitude. Attitude differences were found on the demographic variables of sex, political party, and religion. Women expressed more tolerant attitudes than men toward all four outgroups studied. Republicans were more prejudiced toward homosexuals and women than were Democrats or Independents. Participants who identified themselves as Christians were less supportive of equality between the sexes than were Catholics, Protestants, or those with no religion Christians were also more prejudiced toward homosexuals than were Catholics or those with no religion.     

Do children use similar processes to read and spell words?

The use of spelling-sound information in both reading and spelling was evaluated by having children read and spell nonwords and five types of words that differed in terms of their regularity for reading and spelling. The subjects were grade 3 children who had been psychometrically defined as good readers and good spellers (“good”), good readers and poor spellers (“mixed”), or poor readers and poor spellers (“poor”). Results indicated that all children attempted to use spelling-sound correspondences in both reading and spelling, although children in both the mixed and the poor groups had weaker knowledge of these correspondences and were less systematic in their use of them. Furthermore, even though the children in the mixed group had been matched with children in the good group on reading comprehension, the number and type of errors made by the mixed subjects on both the reading and spelling tasks were more similar to those of the poor subjects than to those of the good subjects.     

Fathers' expectations and aspirations for their children

Do contemporary fathers have the same kinds of goals, beliefs, aspirations, and expectations about their children that fathers had 30 years ago? To answer this question, we interviewed 102 White fathers of 133 daughters and 126 sons about the topics probed by Aberle and Naegele (1952). We also asked about how the fathers expressed approval and disapproval of their children's behaviors, about their techniques for encouraging their children to develop the traits the fathers considered desirable, and about the sources of sex education for children. In general, our contemporary fathers mimicked some of the expectations of the earlier group and differed in others. Like the earlier group, some expectations were gender stereotypic. These expectations presumably function to restrict or limit the socialization of their children. More striking were the differences in the two sets of responses. In contrast to the statements from Aberle and Naegele's fathers, our fathers expressed many similar expectations for their daughters and sons. The educational and occupational levels of the fathers and the family composition qualified only a few of the above results.     

Selective attention and priming: Inhibitory and facilitatory effects of ignored primes

The priming effects of ignored information have been studied in Stroop displays (Neill, 1977) and with spatially superimposed drawings (Tipper, in this issue); naming of probes related to ignored primes is delayed in these experiments (“negative priming”). This negative priming effect is confirmed in a list reading task in Experiment 1, which used partially superimposed letters, and Experiment 2, which used spatially separated letters. Furthermore, Lowe (1979) using Stroop colour words observed that changing the nature of the probe such that it did not require selection from a competing word reversed the priming effects of the ignored word from inhibition to facilitation. Experiment 3 confirmed this observation when subjects selected a red letter from a green letter. Two models are suggested to account for this result. In the first, negative priming is a product of the ignored prime and subsequent probe being encoded both as a stimulus to be ignored and one to be named (Allport, Tipper and Chmiel, in press; Lowe, in press). This dual encoding is ambiguous, requiring further processing before response can be output. The other model suggests that negative priming reflects inhibition of response to ignored information, slowing naming latencies to probe stimuli that require the same response. Experiment 4 attempts to differentiate between the models, and the latter inhibition view is preferred.     

Anomalous dominance in sibling stutterers: Evidence from CT scan asymmetries, dichotic listening, neuropsychological testing, and handedness

Two left-handed siblings with developmental stuttering are comprehensively described. The methods of study included speech and language evaluation, neurological and neuropsychological examinations, dichotic listening, auditory evoked responses, electroencephalogram, and CT scan asymmetry measurements. The data from each sibling showed evidence of anomalous cerebral dominance on many of the variables investigated. The CT scan measurements showed atypical asymmetries, especially in the occipital regions. These findings support the theory that stuttering may be related to anomalous cerebral dominance, both on functional as well as structural bases. Implications of anomalous dominance and the resultant effect of hemispheric rivalry on speech fluency are discussed.     

Lexical contribution to nonword-repetition effects: Evidence from event-related potentials

Two experiments investigated the modulation of event-related potentials (ERPs) by the repetition of orthographically legal and illegal nonwords. In Experiment 1, subjects silently counted occasional words against a background of nonwords, a proportion of which were repetitions of an immediately preceding legal or illegal item. ERPs to repeated legal items showed a sustained, topographically diffuse, positive-going shift. In contrast, repeated illegal nonwords gave rise to ERPs showing a smaller and temporally more restricted positive-going modulation. In an attempt to equalize depth of processing across legal and illegal nonwords, subjects in Experiment 2 were required to count items containing a nonalphabetic character against the same background of nonword items. ERPs to repeated legal items showed a modulation similar to, although smaller than, that found in Experiment I, but no effects of repetition were observed in the ERPs to the illegal nonwords. It was concluded that the effects of repeating nonwords, at least as manifested in concurrently recorded ERPs, differ as a consequence of whether items can access lexical memory, and that this is inconsistent with the attribution of such effects solely to the operation of episodic memory processes.     

Experts, amateurs, and refrigerators: Comparing expert and amateur negotiators in a novel task

Recently a controversy has arisen among behavioral decision theory researchers concerning the generalizability of research based upon student subject samples to the behavior of expert decision makers. This study compared the influence of framing and performance constraints (goals or limits) on the ability of expert and amateur negotiators to reach integrative agreements in a negotiation task novel to both. The results suggested that while experts did outperform amateurs on comparable competitive market simulations, the patterns of their performance as influenced by framing and performance constraints were consistent.     

A short version of a spatial activity questionnaire

Newcombe, Bandura, and Taylor developed a questionnaire measuring participation in space-related activities. The activities were classified as masculine, feminine, or neutral in gender stereotyping. A short version of this questionnaire was developed based on an item analysis of the responses by 485 introductory psychology students (236 women and 249 men). The 10 masculine, 10 feminine, and 10 neutral items chosen for the short form were given to 60 subjects (28 women and 32 men), along with a measure of spatial performance (Piaget's water-level task). Reliabilities (by coefficient alpha) were .79, .77, and .75, for the masculine, feminine, and neutral activity subscales, respectively. As with the original scale, women had a greater preference than men for feminine activities, men had a greater preference than women for masculine activities, and women and men had an equal preference for neutral activities. Masculine activity preference was associated with better water-level performance, with the relationship significantly stronger for women (r=.50) than for men (r=.10). Uses for the questionnaire in research on sex-related differences in spatial performance are suggested.