The effects of alcohol concentration on schedule-induced alcohol drinking

DRL schedule-induced alcohol ingestion

“…The data also indicate that DRL schedule-induced alcohol drinking is strikingly similar to that produced by other procedures. For example, the inverse relationship between alcohol solution concentrations and volume consumed that was found in the present study has been previously demonstrated with an FI90-sec schedule (Holman & Myers, 1968), a VF 60-sec schedule (Everett & King, 1970), and an FF 60-sec schedule (Schrot, Hawkins, & Githens, 1971).…”

“…In the present study , intake determinations at 7.5% and 10% alcohol showed that a considerable reduction in alcohol drinking occurred within the second half of each session. Freed et al (1970) and Schrot et al (1971) have described similar changes with different spaced pellet procedures. However, these investigators relied on cumulative lick records to document the changes in drinking.…”

“…An additional finding, which appears to be general, is tha t intakes of high alcohol concentrations increase with repeated presentations of these concentrations. Schrot et al (1971) found that rats on a FF schedule drank more 10% alcohol the second time it was offered. The present DRL study spanned a much longer period of time than the Schrot et al study (189 vs 80 days) and contained at least two presentations of each alcohol concentration.…”

“…Ingestion of the least amount of pure alcohol occurred at 1 %, and ingestion of the largest amount occurred at the highest concentration of 5%. Schrot et al (1971) measured ingestion across alcohol concentrations of 2.5%-10% on a FF schedule, and similarly determined that ingestion of pure alcohol increased as a direct function of alcohol concentration.…”

Weight reduction and “free choice” polydipsic ethanol consumption

“…and the manipulation of ethanol concentration in the experimental cages (Everett & King. 1970; Schrot. Hawkins.…”