L’examen psychologique dans le handicap visuel : intérêts et limites méthodologiques

The psychological assessment of visually impaired people (blind or partially sighted) confronts the psychologist with methodological constraints regarding the choice of assessment tools. Both critical judgement and an extensive psychometric knowledge are necessary. The objective of this article is to present the results of a study in which the existing tools in this field are identified. The results of this study bring to light the shortage of tools and methods of investigation specifically designed to assess the different psychological facets (affective, cognitive or conative) of visual impairment. We will then examine the methodological and psychometric issues specifically related to assessment in the field of visual impairment. Although some tools have psychometric qualities for the assessment of blind and visually impaired people (Miller & Skillman, 2003; Reid, 1997), we note that the limits of some tests are often overlooked or ignored (Reid, 1997; Tobin, 1994; Tobin & Hill, 2011). Questions relating to the use, adaptation and translation of foreign language tools are examined. In order to illustrate these points, we present some practices used by psychologists which highlight the limits of currently existing tools for the assessment of the psychological, in particular, the cognitive facet, and in addition provide some recommendations for assessment.     

Attentional modulation of masked repetition and categorical priming in young and older adults

Three experiments examined the effects of temporal attention and aging on masked repetition and categorical priming for numbers and words. Participants' temporal attention was manipulated by varying the stimulus onset asynchrony (i.e., constant or variable SOA). In Experiment 1, participants performed a parity judgment task and a lexical decision task in which categorical priming and repetition priming were, respectively, tested. Experiment 2 used a semantic categorization task testing categorical priming. In Experiment 3, repetition and categorical priming were tested in the same semantic categorization task with the same stimuli. The results of the three experiments showed that masked repetition priming is insensitive to manipulations of temporal attention whereas categorical priming is. Furthermore, no differences were found between young and older adults in repetition priming effects, again contrasting with the categorical priming results for which older adults were more sensitive to attentional manipulations than young adults.     

Age-related differences in automatic stimulus-response associations: Insights from young and older adults’ parity judgments

Young and older adults completed a parity judgment task (i.e., judging whether a target digit was odd or even) in which target numbers were preceded by masked prime numbers presented for 43 msec. Targets were either congruent (i.e., they had the same parity status as their primes) or incongruent (i.e., odd primes were paired with even targets, and even primes were paired with odd targets). Response times, percent errors, and event-related potentials (ERPs) were recorded for all items to compare automatic stimulus—response association (ASRA) and congruence effects (i.e., better performance on congruent than on incongruent trials) across age groups. Two important original sets of findings were obtained in this sample of participants. First, both age groups showed ASRA effects in behavioral measures. Second, age-related differences were observed in amplitude, timing, and scalp distributions for each congruent and incongruent ERP. These findings have implications for furthering the understanding of ASRA effects and of general characteristics of cognitive processes affected (or not affected) by aging.