Two experiments involving 224 college undergraduates investigated retroactive inhibition (RI) with paired associates learned under the A-B, A-C, the A-B, A-Br, or the A-B, C-D paradigm. First-list retention was assessed using one of three types of unpaced multiplechoice test. When each test item included the specific competing response from the second list, there was a substantial amount of RI; whereas no RI appeared when test items entailed only first-list responses or noncompeting second-list responses. The results were interpreted as evidence for specific response competition.
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