The present study examined the degree to which varying amounts of jackpot size would impact the rate and subjective probability of slot machine play in recrea-tional gamblers. Twenty college undergraduates who reported occasional slot machine playing served as participants. Two groups of 10 participants were utilized with each group exposed to one of two monetary contingencies ($0.50 USD versus $2.00 USD). Various behavioral measures (e.g., inter-response times, subjective probabilities) were measured on each individual trial, and re-sistance to extinction was also examined. A significant difference of trial out-come (following losses and following wins) was found in respect to inter-response time in that inter-response times were significantly greater following winning trials (i.e., spins) than losing trials, and this difference was not miti-gated by jackpot size. Jackpot size only altered responding to near-miss jack-pots during extinction conditions. Implications for the treatment of pathological gamblers are presented.



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.