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The relationship between family size and adjustment of children was studied in 256 Midwestern children. The Rogers test of personality adjustment was used. The children in the sample lived in rural areas and towns with populations under 10000 in Ohio Kansas Iowa and Wisconsin. Family sizes ranged from 2 to 11 children. Results indicated that a small family environment does not have a detrimental effect on the childrens personality development and suggested that children from smaller families might fare better psychologically than children from larger families. These findings tend to agree with those of Nye but are at variance with those reported by Bossard and Boll and by Ellis and Beechley. It is noted however that the purpose samples used and methods of analysis employed in the studies were different which makes comparisons difficult.

Detections, false responses, and response latencies were measured for subjects monitoring auditory signals (more‐intense noise pulses in a periodic‐noise pulse train) over a 1‐h period following administration of a stimulating drug (D‐amphetamine), an antiadrenergic tranquilizer (chlorpromazine), an anticholinergic tranquilizer (benactyzine), and a placebo. It was tentatively concluded that changes in performance over time following administration of the placebo could be explained in terms of shifts in subjects' criteria for responding and that, following administration of the tranquilizer, shifts both in effective sensitivity and response criteria were occurring. Following injection of D‐amphetamine, performance remained relatively constant throughout the monitoring period.