41. In fact, some drugs may be aversive for individuals for whom the effects could worsen affective deficits. 42. Negative reinforcement occurs when a dog discovers that a particular response ends the presentation of an aversive stimulus. 43. Alarm or aversive stimuli are transmitted to other pigs not only by auditory cues but also by pheromones. 44. In 1948, Hobart Mowrer accepted a research-only position at the aversive conditioning or avoidance learning. 45. Parents who use an aversive style of parenting can also contribute to the social aggression in their children. 46. When warnings such as " Look out ! " are heeded, the listener may avoid aversive stimulation. 47. Small rodents can be used to study aversive conditioning and emotional memory, and contextual / spatial memory. 48. Parents who had received the LIFT intervention had lower ratings of caregiver aversive behavior such as physical punishment. 49. We're a slow-moving system, and we're a little risk aversive ." 50. Several national and international disability rights groups have spoken against the use of aversive therapies, including AUTCOM ).