these results suggest that ( a ) even under a single motivational state the nature of signal-centered behavior can be determined by type of reinforcer , ( b ) although water reinforcement produces less signal contact than food reinforcement , this can be facilitated with more severe water-deprivation levels , and ( c ) high cs-contact rates using food reinforcement are not simply a product of reductions in body weight with food deprivation .
C0026605
motivational
C0004927
behavior