Safety signals provide "relief" through predicting the absence of an aversive event. At issue is whether these signals also act as instrumental reinforcers. Four experiments were conducted using a free-operant lever-press avoidance paradigm in which each press avoided shock and was followed by the presentation of a 5-sec auditory safety…

The contradiction emerging between the lived experience of a minority of marginalised urban youth and the punitive operant conditioning of antisocial behaviour legislation is illustrative of the increasing gap between society's expectations of behaviour and the coming reality. In this paper, Loic Wacquant's sociology of advanced marginality is…