Which term refers to the time from the onset of a stimulus to the initiation of a response?

• A. Response Latency
• B. Repertoire
• C. Response Generalization
• D. Replication

Answer: (A)

Latency refers to the time between when a stimulus appears and when the response begins. This measure captures how quickly an individual initiates a response after the cue, and it specifically names that delay from stimulus onset to initiation. It’s distinct from how long the response lasts (response duration) or the time between separate responses (inter-response time). In this item, the term that fits is response latency because it directly describes that delay from stimulus appearance to starting the response. Repertoire describes the entire set of behaviors a person can perform, not a timing measure. Response generalization concerns when a learned response occurs with similar but new stimuli, not about timing. Replication is about repeating procedures to verify results, not about response speed.