The Effects of Common and Uncommon Elements on the Emergence of Simple Discriminations Page: 16
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session, this participant responded in the presence of the putative discriminative stimulus at a
mean rate of 1.75 responses per second and ended the session with accelerated rate of responding
that began in the fourth discriminative stimulus interval (see Figures 2 and 3). More responding
was observed in the presence of the putative s-delta during this participant's session as compared
to the other participants in this group (mean rate = .88/s). Visual inspection of participant 3's
non-cumulative data shows responses in the presence of the putative s-delta occurring only
during the first half of the 15-second interval (see Figure 2).
Participant 4 responded at a significantly lower rate in the presence of the putative
discriminative stimulus than the other participants in this group, averaging 0.36 responses per
second; however, these data were consistent with those of the other participants because this
participant responded almost exclusively in the presence of the putative discriminative stimulus
(see Figure 1). One response in the presence of the putative s-delta occurred during the first half
of the first presentation interval (see Figures 2 and 3).
Figure 4 depicts the cumulative frequency of responding for participants in the
uncommon elements group in the same manner that Figure 1 did for the common elements
group. Overall, higher cumulative frequencies of responding were observed in the presence of
the putative s-delta relative to the common elements group. Additionally, the data paths for each
participant in the uncommon elements group overlap at some point and responding extinguishes
early in the experimental session. Both of these features were not present in any of the common
elements data sets.
Figure 5 depicts the same frequency data for participants in the uncommon elements
group on a non-cumulative graph in the same manner that Figure 2 did for participants in the
common elements group. In general, we see low frequency responding that carries on across16
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Niland, Haven Sierra. The Effects of Common and Uncommon Elements on the Emergence of Simple Discriminations, thesis, May 2019; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc1505220/m1/22/: accessed July 17, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; .