Mirror writing in pre-school children: a pilot study

Mirror writing refers to the production of individual letters, whole words or sentences in reverse direction. Unintentional mirror writing has been observed in young children learning to write and interpreted as the manifestation of different cognitive impairments. We report on mirror writing instances in a sample of 108 pre-school children. Results showed MW to be age-related but independent from handedness and left-right discrimination abilities. We propose an account of mirror writing as reflecting dissociation between acquired motor programmes for letter shape composition and unspecified spatial direction of hand movements. Before learning to write, the child’s directional cognitive system is assumed to be dichotomous, thus inducing the production of randomly oriented asymmetrical letters.     

Situational information contributes to object categorization and inference

Three experiments demonstrated that situational information contributes to the categorization of functional object categories, as well as to inferences about these categories. When an object was presented in the context of setting and event information, categorization was more accurate than when the object was presented in isolation. Inferences about the object similarly became more accurate as the amount of situational information present during categorization increased. The benefits of situational information were higher when both setting and event information were available than when only setting information was available. These findings indicate that situational information about settings and events is stored with functional object categories in memory. Categorization and inference become increasingly accurate as the information available during categorization matches situational information stored with the category.     

Postdrinking Sexual Inferences: Evidence for Linear Rather Than Curvilinear Dosage Effects1

Observers infer more sexual availability and willingness from a drinking dater. We hypothesized that, as dosage rises, these sexual inferences follow a linear pattern. College participants rated a woman (Study 1) and man (Study 2) exhibiting a sober, moderate, or high level of intoxication while with a light-drinking companion. Alcohol was perceived as having linear effects on sexual availability; and, except for male participants in Study 2, alcohol was perceived as having linear effects on willingness. Thus, with rising intoxication and diminished capacity for arousal, drinkers are perceived as more available and willing. Findings are discussed relative to expectancy models of sexuality. Reasons for desynchrony between alcohol's actual supression of sexual arousal and its perceived enhancement of willingness are presented.     

COMPARISON OF EXTINCTION,DRO 0-SEC,AND DRO 6-SEC IN THE ELIMINATION OF IMITATIVE RESPONDING UNDER DISCRETE-TRIAL PARADIGMS1

Imitative response levels were observed for normal 5-yr-old children within a discrete-trial imitation paradigm. Following imitation training sessions, children were observed under conditions of contingent reinforcement for three experimental sessions. Following the contingent reinforcement phase, children were then observed under reversal conditions for four sessions. A 3 × 4 repeated measures design was employed for observing response decrements under conditions of extinction, DRO 6-sec, and DRO 0-sec. The DRO 0-sec group demonstrated a significantly greater decrement in imitative responding than did the DRO 6-sec and extinction group. The differences in effects between the two DRO conditions and results from previous studies in which DRO procedures have had little effect in reducing imitative responding, suggest an incomplete understanding of the ways in which DRO procedures may operate.