Prospective Prediction of Alternative High School Graduation Status at Emerging Adulthood1

Most studies that examine the prediction of graduation status among teens have examined those who attend regular high schools. The present study reports the prediction of high school graduation status 5 years later among 646 youth who attended alternative (continuation) high schools at baseline. Those youth at baseline who: (a) reported less intention to use soft drugs (cigarettes, alcohol, or marijuana) during the next year; (b) suffered relatively few drug‐related consequences during the last year; (c) were relatively less likely to have carried a weapon (knife or gun) in the last year; (d) reported feeling relatively hopeful about the future; and (e) were older were more likely to self‐report having graduated continuation high school 5 years later. These results suggest that the consequences of drug use, not drug use per se, other illegal behavior, and a sense of well‐being are important predictors of graduation among groups of high‐risk teens. Problem behavior and resiliency theories are offered as potential explanations of these findings.     

Conjoint design and analysis of the bilinear model: An application to judgments of risk

Conjoint measurement tests which are applicable to a (2 × 2) × (2 × 2) experimental design for the study of the general bilinear model are developed. The tests permit detecting the cause of each failure of the data to satisfy the model, and of measuring the tradeoffs between variables when the model is satisfied. All tests and analyses are illustrated with an application of the model to the assessment of the riskiness of gambles. The method is compared with the use of duplex gambles and other compound and contingent compositions in terms of their appropriate roles in the study of the decision process.     

Extinction of responding maintained by timeout from avoidance

The resistance to extinction of lever pressing maintained by timeout from avoidance was examined. Rats were trained under a concurrent schedule in which responses on one lever postponed shock on a free-operant avoidance (Sidman) schedule (response-shock interval = 30 s) and responses on another lever produced 2 min of signaled timeout from avoidance on a variable-ratio 15 schedule. Following extended training (106 to 363 2-hr sessions), two experiments were conducted. In Experiment 1 two different methods of extinction were compared. In one session, all shocks were omitted, and there was some weakening of avoidance but little change in timeout responding. In another session, responding on the timeout lever was ineffective, and under these conditions timeout responding showed rapid extinction. The within-session patterns produced by extinction manipulations were different than the effects of drugs such as morphine, which also reduces timeout responding. In Experiment 2 shock was omitted for many consecutive sessions. Response rates on the avoidance lever declined relatively rapidly, with noticeable reductions within 5 to 10 sessions. Extinction of the timeout lever response was much slower than extinction of avoidance in all 4 rats, and 2 rats continued responding at baseline levels for more than 20 extinction sessions. These results show that lever pressing maintained by negative reinforcement can be highly resistant to extinction. The persistence of responding on the timeout lever after avoidance extinction is not readily explained by current theories.     

Variable-ratio schedules of timeout from avoidance: effects of d-amphetamine and morphine.

Rats were trained on concurrent schedules in which pressing one lever postponed shock and pressing the other lever produced periods of signaled timeout from avoidance on variable-ratio schedules. These procedures generated high rates of timeout-reinforced responding and provided a baseline for studying the effects of drugs on behavior maintained by different types of negative reinforcement (shock postponement vs. timeout). Morphine (2.5 to 10.0 mg/kg) reduced behavior maintained by timeout at doses that increased or had no effect on avoidance responding. In contrast, d-amphetamine (0.125 to 2.0 mg/kg) produced large increases in timeout responding at doses that had minimal effect on avoidance in rats trained on variable-interval and variable-ratio schedules. Thus, the event-dependent effects of morphine, observed in previous studies in which timeout responding was maintained at low rates by interval schedules, were replicated with high timeout rates maintained by variable-ratio schedules. The effects of d-amphetamine could also be described as "event dependent" because timeout responding was stimulated more than avoidance regardless of the maintenance schedule or baseline rate.     

How do children form impressions of persons? They average

The experiment reported was concerned with impression formation in children. Twelve subjects in each of Grades K, 2, 4, and 6 rated several sets of single trait words and trait pairs. The response scale consisted of a graded series of seven schematic faces which ranged from a deep frown to a happy smile. A basic question was whether children use an orderly integration rule in forming impressions of trait pairs. The answer was clear. At all grade levels a simple averaging model adequately accounted for pair ratings. A second question concerned how children resolve semantic inconsistencies. Responses to two highly inconsistent trait pairs suggested that subjects responded in the same fashion, essentially averaging the two traits in a pair. Overall, the data strongly supported an averaging model, and indicated that impression formation of children is similar to previous results obtained from adults.     

Attention decrement,temporal variation,and the primacy effect in impression formation

Three experiments which tested the attention decrement explanation of the primacy effect in impression formation are reported. A memory-crowding interpretation of attention decrement would predict a decrease in primacy as the interval between traits is increased. Mild support was obtained in Experiment I but not in II or III. Overall. the magnitude of the primacy effect was independent of intertrait temporal variation. Decrement in attention is the most attractive theoretical explanation for the commonly obtained primacy effect. However, the results of the present series of studies suggest that this explanation is not tenable and that other theoretical mechanisms will be required to account for primacy effects.