A general scheme for the analytic decomposition of objective test scores: Illustrative demonstrations using the Rod-and-Frame test and the Müller-Lyer illusion

Objective tests of personality typically include a number of items or trials; the total score on the test is the sum of the subject's “correct” responses across all such trials. Normally, the trials are varied systematically across various facets of the test design, so that the total score represents a composite measure of accuracy averaged across these test facets. However, since only one score is computed for each subject, some potentially important kinds of individual differences—namely all those associated with each particular variation in the test design—are treated solely as measurement unreliability. Such a psychometric stance may serve to obscure more differentiated types of individual differences, with the result that composite scores from trials based on one type of experimental design may not be highly related to such scores from trials using a somewhat different design. The present paper presents a general procedure for scoring objective tests more analytically. To illustrate this general rationale, and to demonstrate its potential utility, data have been reanalyzed from two previous studies, one using the Rod-and-Frame test, the other the Müller-Lyer illusion. In both cases, the traditional global accuracy score did not correlate significantly with other theoretically related variables, while a number of component scores were quite highly related.     

From individual to group impressions: Availability heuristics in stereotype formation

When subjects are presented with information about the attributes of individuals and are then asked to make judgments about the characteristics of the group composed of those individuals, the group impression may depend on the way in which data on individuals are organized in memory. Experiment 1 demonstrated that under conditions of low memory load (16 instances of person-trait pairings), subjects organize their perceptions of a group around the characteristics of its individual members, whereas under high memory load (64 instances of person-trait pairings), subjects organize trait information in an undifferentiated way around the group as a whole. Under low memory load, subjects distinguish between repeated occurrences of a trait in the same individual and comparable repeated occurrences of that trait in different individuals; under high memory load, subjects do not make such a differentiation. Subjects' judgments about the frequency of categories of traits were related to the ease of recall of category instances, as predicted by an availability heuristic. Experiments 2 and 3 demonstrated that group members who are most available in memory will be disproportionately represented in the group impression. Specifically, the proportion of extreme individuals in a group was retro-spectively overestimated; this was true for both physical stimuli (height) and social stimuli (criminal acts).     

Children's ability to integrate class information

Coordination and integration of class information was examined using a multidimensional similarity judgment task in which four- and nine-year old children rated the similarity of pairs of stimuli sharing either one or two atribute values. Half the children at each age were assigned to an attention condition requiring they label relevant stimulus atributes before making their similarity ratings. The other children were in the nonattention condition, and rated similarity without labelling the attributes. The results indicated that four-year-olds in the attention condition and nine-year-olds in both conditions integrated class information in making their similarity judgments. Performance of the four-year-olds in the non-attention condition tended to improve across trials; they appeared to integrate class information on later trials.     

The interaction of personality and job scope in predicting turnover

The interaction of employee personality characteristics and job scope in the prediction of turnover was studied. One hundred and nine individuals employed as machine operators (low-scope job) and scientific and technical personnel (high-scope job) within a large manufacturing organization were the sample. No direct relationships were found between personality characteristics and turnover for the combined sample of employees on high- and low-scope jobs. When correlational analyses were carried out within job scope samples it was evident that personality and job scope interacted in predicting turnover. For employees on high-scope jobs, turnover was negatively related to the need for achievement and positively related to the need for affiliation. Turnover was negatively related to the need for affiliation among employees on low-scope jobs. The implications of these findings for future research on turnover were discussed.     

Orientation in cognitive maps

In 14 experiments, subjects had to “point to” surrounding environmental locations (targets) while imagining themselves in a particular spot facing in various directions (orientations). The spatial information was either committed to memory (cognitive maps) or directly presented on each trial in the visual or tactile modality. Reaction times (RT) indicated that orientation shifts were achieved through mental rotation in the visual task, but not in the cognitive map or tactile tasks. Further, in the latter two tasks targets were located most quickly when they were adjacent to or opposite the imagined orientation. Several explanations of this finding were tested. Various aspects of the data suggest that cognitive maps are not strictly holistic, but consist of orientation-specific representations, and—at least in part—of relational propositions specific to object pairs.     

The retrieval of sentences from memory: A speed-accuracy study

A speed-accuracy tradeoff method was used to study the retrieval dynamics for recognition memory of parts of sentences. All sentences contained a subject, verb, object, location, and time. Recognition accuracy increased from chance at a processing time of about 0.5 sec to asymptotic accuracy at about 3 sec. The asymptotic accuracy levels for subject-verb, subject-object or verb-object recognition probes exceeded those of pair probes containing times or locations. This result suggests that the former may be more closely associated in semantic memory. The only difference among speed-accuracy curves was in asymptotic accuracy. The chance intercept and the rate of increase in accuracy were similar for all pair probes. A second finding was that the speed-accuracy curves for triple probes (e.g., subject-verb-object) were virtually identical to those of the comparable pair probes. These results appear to contradict a serial search hypothesis for the access of information from semantic memory. They support a parallel, direct-access hypothesis.