Extinction of human eyelid conditioning as a function of components of a masking procedure

Ronald S. Kessler, Carl D. Willia, Neil Schneiderman

Research output: Contribution to journalArticlepeer-review


Eyelid conditioning and extinction procedures were embedded in a masking probability learning task. On non-CS trials interspersed with extinction trials, a 100% masking (100% M) group received the US along with the masking stimuli, whereas a masking + free-shock (M + FS) group received US-alone presentations. A control (C) group received the same stimuli as did Group 100% M but with neutral instructions. Group 100% M revealed more, but Group M + FS revealed less, resistance to extinction than did Group C. Only the M + FS group extinguished completely.

Original languageEnglish (US)
Pages (from-to)337-338
Number of pages2
JournalPsychonomic Science
Issue number6
StatePublished - Dec 1969

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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