Lever-press duration as a measure of frustration in sucrose and drug reinforcement
ConclusionsThese data also show that average bar-press durations do not correlate with the number of bar presses, meaning that press duration is an independent measurement that represents a behavioral construct distinct from craving, which is typically measured with number of bar presses. Essentially, these results support that bar press durations can be used as a real-time measure of frustration as a 4th major facet of addiction-related behavior, adding to craving, impulsivity, and habit.
Source: Psychopharmacology - Category: Psychiatry Source Type: research