The present study sought to control for absolute consistency in experimenter behavior and reaction to the subject's verbal emissions. To attain this end, a computer was programmed to simulate the functions of the experimenter. Not only were the instructions to the subject and the experimental stimuli presented in a standardized manner, but invariance in the reinforcing operations was attained. The computer was programmed to recognize the preselected response class and ...
Data on observed mealtime behavior and recall of that behavior were compared and analyzed to determine the veridicality of retrospective data. Families ate two meals while under observation using video tape recording equipment. Half of the families were interviewed three weeks later and the other half six weeks after the meals. Using extensive interviewing procedures the parents were asked to report all that they could remember about the two meals ...
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