A slot is a narrow opening or slit, especially one for receiving something, such as coins or letters. It is also a position that has a specific grammatical function within a construction, such as the slot of an adjective or the slot of a preposition.
The modern slot machine is a far cry from its mechanical ancestors. Computer chips have replaced spinning wheels, and electronic credits are used instead of currency. While these innovations may seem trivial, they are the key to a machine that beguiles millions of people on a daily basis and generates profits for its owners. Aside from these technological advances, most of the machine’s design is still rooted in the allure of chance and probability.
As with any gambling game, there is the danger of gambling addiction and problems arising from its use. While most gamblers are recreational players who enjoy the allure of slots, a small percentage can develop severe gambling problems. These problems can be costly and impact a player’s personal, family and professional lives. A disproportionate number of these problem gamblers are female and/or from low-income communities.
Slots are the most prevalent form of gambling in casinos and other commercial gaming establishments. They are operated using a Random Number Generator and are driven by a central computer system. Players place cash or, in “ticket-in, ticket-out” machines, a paper ticket with barcodes into a slot. Upon activation, the machine displays reels with symbols and the player earns credits based on the payout table of the particular machine. Symbols vary from classic objects to stylized lucky sevens. Most slot games have a theme and the bonus features align with that theme.
This study examines the effects of sound on arousal processing in slot machine play. Previous studies of reward reactivity have tended to focus on the physiological effects of music alone and do not account for the synchronization of sight and sound that is typical of slot machine games. We use a video-based simulation of a multiline slot machine and find that sounds of winning evoke greater arousal than losses do, and that this effect is exacerbated when the winning sounds are accompanied by visual feedback (such as the highlighting of the symbols responsible for the win).
To evaluate the effects of sound on reward reactivity, we administered two psychophysiological measures of reward reactivity to participants playing a virtual slot machine: the arousal response (PRA) and the incentive-to-win index (IWIN). Both measures are simple, noninvasive and ecologically valid, making them ideal candidates for future applications in gambling research. These measures are in addition to the CPGI, a questionnaire used for problem gambling assessment and the PGSI, a measure of severity. They provide important insights about the role of sound in slot machine arousal and reinforcement.