Delayed Matching-to Sample in a Woman with Alzheimer´s Disease

In the present study, a 91-year old woman with Alzheimer’s Disease (AD) participated. She had a Mini Mental Status Examination (MMSE) score of 17. The study included two experiments with identity matching of color stimuli. In Experiment 1, was the participant presented for delayed matching-to-sample (DMTS) 0s and simultaneous matching-to-sample (SMTS). The results showed how the number of trials to meet criterion of mastery were reduced through repetitive training. In Experiment 2, she was presented for DMTS with delays of 12s, 24s, 18s, 15s, and 13.5s. The results showed that the participant responded to criterion in the DMTS 12s and the DMTS 13.5s conditions. In addition, did the result show that the number of trials to criterion increased in the highest delay conditions.