TY - RPRT TI - Delayed choice responding by pigeons when the correct response is not predictable from the sample stimulus. AU - J P Smith AU - J C Attwood AU - L Niedorowski PY - 1982 DO - 10.1901/jeab.1982.37-57 UR - https://pubmed.ncbi.nlm.nih.gov/7057130/ ID - 7057130 ER -