Based on self-regulatory failure and operant analyses of counterregulatory eating by restrained eaters, this study evaluated the efficacy of two potential determinants of regulatory eating. Within a 2 (restraint) X 2 (label) X 2 (bowl) factorial design, 60 restrained and 60 unrestrained eaters (all women) consumed a milk shake preload and then taste-tested ice cream. All subjects were provided with the same amount of ice cream, but it was presented either in small or large bowls (the bowl variable) accompanied, or not accompanied, by accurate information about calories contained in the ice cream (the label variable). The double-experimental condition (small-bowl-labeled) produced regulatory eating in restrained and unrestrained subjects. Conversely, both groups counterregulated in the control condition (large-bowl-unlabeled). When only one of the two experimental procedures was operational (small-bowl-unlabeled; large-bowl-labeled), restrained eaters used bigger spoonfuls to consume more than unrestrained eaters; the restrained eaters also disproportionately lowered their caloric estimates of their consumption only in these two cells. Three conclusions are discussed: (a) procedures that accentuate the salience of self-monitoring current eating to broader concerns about dieting may facilitate regulatory eating; (b) a high-density eating style may importantly affect counterregulatory eating; and (c) further research is needed to test the external validity of these and related findings and to explain the heterogenity in eating behaviors shown by restrained eaters.Several convergent indicators suggest that restrained eaters, or self-reported chronic dieters (Herman & Mack, 1975), represent a population at risk for gaining excess weight and, perhaps, for developing obesity or an increasing degree of obesity if already substantially overweight. First, restrained eaters, compared to unrestrained eaters, more frequently exhibit problematic eating behaviors, including binge eating (Hawkins & Clement, 1980;Wardle, 1980; Spencer & Fremouw, Note 1), eating in response to emotional stimuli (e.g., Baucom & Aiken, 1981;, and counterregulatory eating (eating more after partial satiation than after minimal consumption;The authors greatly appreciate the suggestions and assistance provided by Arnold M. Ordman.