THE CROSS-CULTURAL STUDY OF INTELLIGENCE: PIAGET AND THE BAOULÉ*

There are two aspects of Piaget's theory that can be at least partly distinguished: (1) The stage theory, or the development of particular concepts through a series of hierarchical stages; (2) The metatheory, or the interactionist model of adaptation (assimilation and accommodation) that explains the mechanisms of cognitive development. Most cross-cultural research has been based on the first of these aspects, using and adapting “Piagetian tasks ”in various conceptual areas. Some findings of this line of enquiry, and the methodological problems encountered, are briefly reviewed. It is argued that no specific task, nor a combination of them, can be taken to measure a general cognitive level; the tasks measure the attainment of particular concepts rather than “intelligence”. New evidence is presented on the reliability and validity of Piagetian tasks used in a cross-cultural setting. In the second model, intelligence is broadly defined as adaptation to the environment; in this conception it would be reasonable to expect divergent paths of cognitive development in different cultures. In other words, one might need a different Piagetian psychology in each culture, but based on universal deep mechanisms. As a modest contribution to a more “emic ”study of intelligence, the concept of intelligence as defined by the Baoulé of Ivory Coast, n'glouèlě is presented and discussed. Ratings on n'glouèlě and its different components are related to performance on Piagetian tasks in a sample of 8- to 9-year-old rural Baoulé children. The thrust of the paper is to point out once more the cultural relativity of any conception of intelligence, be it from a Piagetian or any other perspective.     

The right-hemisphere bias in conditional reasoning: A short report on multiple failures to replicate previous findings

Summary The present set of studies attempted to replicate Gellatly's (1985) findings that were supportive of Evan's (1982) hypothesis that the right hemisphere produces a selective bias towards the incorrect solution of a complex reasoning task. Subjects solved problems of the form if p then q. In four studies, participants simultaneously performed a bottle - balancing task on each hand to interfere with processing of the reasoning task in the right hemisphere. In the fifth study, the bottle - balancing task was replaced by a finger - sequencing task. The results of the five studies did not show that the interference with right-hemisphere activity resulted in better performance on the conditional-reasoning task. It is concluded that the hypothesis of a right-hemisphere bias in conditional reasoning is still in need of reliable findings.     

Coordinate systems in the long-term memory representation of three-dimensional shapes

Visual information can be stored relative to a particular point of view or independently of any particular point of view. Research on mental rotation has shown that people can store and use viewer-centered visual representations of objects and scenes. Some theories of object recognition posit that object-centered representations are also stored and used to represent the shape of three-dimensional objects. In this paper a series of experiments provides evidence that people can store and use both viewer-centered and object-centered representations of three-dimensional objects.     

Priming in a free association task as a function of association directionality

Two experiments investigated priming in free association, a conceptual implicit memory task. The stimuli consisted of bidirectionally associated word pairs (e.g., BEACH-SAND) and unidirectionally associated word pairs that have no association from the target response back to the stimulus cue (e.g., BONE-DOG). In the study phase, target words (e.g., SAND, DOG) were presented in an incidental learning task. In the test phase, participants generated an associate to the stimulus cues (e.g., BEACH, BONE). In both experiments, priming was obtained for targets (e.g., SAND) that had an association back to the cue, but not for targets (e.g., DOG) for which such a backward association was absent. These results are problematic for theoretical accounts that attribute priming in free association to the strengthening of target responses. It is argued that priming in free association depends on the strengthening of cue-target associations.     

The effect of prior experience on recognition thresholds for plane-disoriented pictures of familiar objects

We investigated plane rotation effects on the minimum presentation duration that is required in order to recognize pictures of familiar objects, using the method of ascending limits. Subjects made unspeeded verification responses, selecting from 126 written alternatives. Replicating similar identification studies in which brief, masked pictures (Lawson & Jolicoeur, 1998) were presented, disorientation reduced the efficiency of recognition. Mirroring the findings in speeded picture naming studies (e.g., Jolicoeur, 1985; Jolicoeur & Milliken, 1989), but in contrast to those of Lawson and Jolicoeur (1998), orientation effects were found over a wide range of views and were attenuated but not eliminated with experience with a given object. The results bridge the findings from unspeeded verification and speeded naming tasks. They suggest that the same orientation-sensitive processes are tapped in both cases, and that practice effects on these processes are object specific.     

Fluency versus conscious recollection in category-production performance: the performance of schizophrenic patients

The purpose of this study was to investigate the relative contribution in schizophrenics of automatic processes (fluency) and conscious processes (conscious recollection) for the control of preencoded material in category production tasks. In one condition (Exclusion condition), subjects were told specifically not to produce previously presented words during the category-production task. This condition was compared with a standard category-production task in which subjects were told to produce the six first words that came to mind for a semantic category (Inclusion condition). In the inclusion condition, the effects of conscious control and automatic processes operated in the same direction, whereas in the exclusion condition automatic influences and conscious control were opposed. A recognition task followed the category-production tasks. Since the exclusion condition required conscious control of encoded items, we hypothesized that schizophrenic patients would be less able than control subjects to avoid producing study list items. These results indicated that schizophrenics' performance differed from these of control subjects in the exclusion condition but not in inclusion condition. Recognition performance was similar in both the schizophrenic and the control groups. These results suggest a defective conscious control in schizophrenic patients and confirm the data from the literature on explicit memory in these patients.     

Measuring symbol and icon characteristics: Norms for concreteness, complexity, meaningfulness, familiarity, and semantic distance for 239 symbols

This paper provides rating norms for a set of symbols and icons selected from a wide variety of sources. These ratings enable the effects of symbol characteristics on user performance to be systematically investigated. The symbol characteristics that have been quantified are considered to be of central relevance to symbol usability research and include concreteness, complexity, meaningfulness, familiarity, and semantic distance. The interrelationships between each of these dimensions is examined and the importance of using normative ratings for experimental research is discussed.     

Gender differences in acute and chronic stress in Wistar Kyoto (WKY) rats

While females are considered more susceptible to depressive behavior, this assertion is not strongly supported by the experimental literature. Since stress contributes to depressive behavior, male and female Wistar Kyoto (WKY) rats were exposed to either one session (acute stress) or 5 sessions (chronic stress) of restraint plus cold in order to study depressive behavior in male and female rats. After their respective treatment exposure, rats were tested in the open field test (OFT) and for retention of a passive-avoidance (P-A) task. One stress session resulted in significant immobility in the OFT for males, whereas 5 sessions were required to produce similar immobility in female rats. Acute stress interfered with the retention of the P-A response for males, while both acute and chronic stress produced poor P-A responses in female rats. Food consumption decresed, progressively, as a function of stress sessions, in female rats, whereas feeding in males returned to control levels after five stress days. Both acute and chronic stress exacerbated the stress ulcer response in male rats, but not in female rats. Chronic, but not acute, stress resulted in an increase in serotonin transporter mRNA levels in the dorsal raphe nucleus of both male and, female rats. The general consensus from these data suggested that female rats were more vulnerable to chronic stress and consequently supported the notion that females may be more susceptible to stress induced behavioral depression.