A series of well-controlled laboratory studies by psychologist Michael Bock examined the relationship between emotional arousal and memory .When individuals were shown a list of words and asked to recall them later, they were better able to recall words with positive emotional impact ( such as kiss and prize ) than words with negative emotional impact ( such as disease and loss ). However, words with a neutral impact were recalled least well in Bock's studies. This suggests that,althuogh Freud was correct in saying that negative events are recalled less well than positive events,experiences with any type of emotional impact appear to be easier to recall than neutral experiences.