Radial localization of odors by human newborns.

To study sensitivity to radial location of an odor source, 20 human newborns, ranging from 16 to 130 hours of age, were presented with a small amount of ammonium hydroxide. The odor source was placed near the nose slightly to the left or right of midline, with its position randomized over repeated trails. Direction of headturn with respect to the odor location and diffuse motor activity were scored from the videotape recordings of the newborns' behavior. It was found that as a group, the newborns turned away from the odor source more frequently than they turned toward it. The tendency to turn away from the odor was stronger in infants who displayed less motor activity after the response. Newborns also exhibited a right bias in the direction of the head movements. It is concluded that a spatially appropriate avoidance response is present in the neonate and that the newborn is innately sensitive to the radial location of an odor.     

A DEFENSE OF "RATIONAL" PERSONNEL SELECTION, AND TWO NEW METHODS

This paper presents two new techniques for use in personnel selection. One is a simple graphical technique which non-technical personnel can use to help in deciding how many minority applicants to admit to an institution. The other is a large-scale computer technique which an institution can use to increase personnel diversity on many variables (including culture) simultaneously. Both techniques appear to have major advantages over the particular technique this author advocated previously (1971). However, the new techniques are based on the same general view the author has expressed earlier (1971, 1973): that personnel selection questions concerning culture must be handled rationally—that is, by human judgment—rather than by mechanical formulas. Early sections of the paper summarize and defend that view.     

Differential development of 24-h retention capacities for two components of T-maze escape learning by infant mice

At 9 or 11 days of age, separate groups of Swiss-Webster mice received 12, 24, or 40 training trials to the goal opposite their first-trial choice in a shock-escape T-maze task. All groups were retested to the same goal for 25 trials 24 h following training, while maturation controls without prior exposure were trained to the goal opposite their first choice. All groups demonstrated increased escape proficiency during original training on two separate escape components: reaching the choice point and making the correct turn at the choice point. During retention testing, all groups at both ages exhibited better escape performance in terms of reaching the choice point than their maturation controls. However, when escape was measured in terms of choice, none of the groups trained at 9 days of age differed significantly from maturation controls when retested at 10 days of age. In contrast, retention of correct choice point turn varied directly with number of original training trials for mice trained at 11 days of age.     

Instrumental escape learning in the rat at 24-hour intertriai interval: Effects of magnitude and schedule of reinforcement

Three experiments investigated the effects of magnitude and schedule of reinforcement and level of training in instrumental escape learning at a 24-h intertriai interval. In Experiment I, two magnitudes of reinforcement were factorially combined with two schedules of reinforcement (CRF and PRF). Under PRF, large reward produced greater resistance to extinction than did small reward, while the reverse was true under CRF. In Experiment II, two levels of acquisition training were factorially combined with three schedules of reinforcement (CRF, single-alternation, and nonalternated PRF). Patterned running was observed late in acquisition in the single-alternation extended-training condition. Resistance to extinction was greater for the nonalternated PRF condition than for the single-alternation condition following extended acquisition, and the reverse was true following limited acquisition. Experiment III confirmed the extinction findings of Experiment II. The results of all three experiments supported an analysis of escape learning at spaced trials in terms of Capaldi’s (1967) sequential theory.     

Three types of conduct‐problem boys in an educational setting

Third grade boys identified as being disruptive to on‐going classroom activities were grouped according to their teacher's ratings of their behaviour characteristics as unco‐operative (Type I), easily flustered (Type II), and unco‐operative and easily flustered (Type III). No significant differences in performance existed between types on individually administered tests of perception and psycholinguistic abilities. On group administered tests of academic achievement and intelligence, the uncooperative boys did significantly better than the other two types. It was also determined that the easily flustered boys did substantially better on individually administered measures of IQ. than they did on group administered measures. These findings suggest that teachers should avoid using group tests to evaluate disruptive boys they perceive as being easily flustered.     

The evaluation from the program director's viewpoint

In considering the evaluation of the preceptorship and residency programs, our faculty were asked to react to specific dimensions and aspects of the studies. Viewpoints about these data were submitted in formal critiques which will be summarized only briefly here. A number of the comments were in response to specific questions which had been posed; other were spontaneous from the faculty.     

Related factors of the MTAI and the 16PF

The Minnesota Teacher Attitude Inventory (MTAI) and the Sixteen Personality Factors Questionnaire (16PF) were administered to 395 undergraduate teachers-in-training. The MTAI and the 16PF were compared using canonical analysis. They contained three related factors accounting for 41% of their total variance. It was concluded that teachers' attitudes toward their pupils are determined in large part by measurable personality traits.