Experimental Design: Internal Validity

Figure Caption. The mean self-protection score on the two Generalization Probes for Control Group children and Experimental Group children.

Figure Caption. The mean blood alcohol content (BAC) of drivers departing Tavern 1 and Tavern 2 across weeks. Data were collected one night a week, first in the absence of the programmed intervention (Baseline) and then while the intervention package was in effect (Treatment).

Table
The mean number of trials to reach the learning criterion on each of the two bi-directional tasks for the two groups of subjects. Group A first learned "given the French words, type the English words" (F-E); then, they learned "given the English words, type the French words" (E-F). Group B learned the two tasks in the opposite order.

Trials-to-Criterion

Figure Caption. The percentage of one minute intervals during the 20-minute dry-land portion of practice in which all swimmers in each of the two groups were being productive across days. Data were collected for one week in the absence of the programmed intervention (No Music) and then during the subsequent week when music was played as a consequence of the productive behavior of Contingent Group swimmers (Music).

Figure Caption. The mean percentage of correct execution of the three tennis st rokes for Experimental Group subjects before exposure to differential reinforcem ent procedure (Day 1) and after it (Day 3) and for Control Group subjects before exposure (Day 3).

Figure Caption. Mean quality points across daily sessions. During some sessions there was no intervention (Baseline) and during other sessions the intervention was operative (Treatment).

Figure Caption. The number of nail biting episodes across days. Data were collected first in the absence of the programmed intervention (Baseline) and then while the self-punishment procedure was in effect (Treatment).

Figure Caption. The percentage of weekly goals met by Private Group subjects and Public Group subjects over the five week experiment.

Figure Caption. The number of spontaneous vocalizations across days of the experiment. Data were collected first in the absence of the programmed intervention (Baseline) and then while the intervention was in effect (Treatment).

Figure Caption. The percentage of patients who were employed, had no arrests, and who attended school regularly during the month prior to them entering Correction House (Before Treatment) and during the month following their departure from it (After Treatment)

Figure Caption. The mean reaction time for Control Group subjects and Experimental Group subjects during the second and third half hour periods of the 90 minute session. Heavy metal music was played only in the third half hour period for the Experimental Group.

Figure Caption. The mean percentage of time during once a week three hour obser vation periods that Control Group infants and Enrichment Group infants spent vis ually attending when they were 37-75 days old and when they were 76-112 days old.