PubMed · 6034011
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H Helson, L L Avant. 1967. Stimulus generalization as a function of contextual stimuli.. https://doi.org/10.1037/h0024319
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In a recall-based spoken production experiment, native English-speaking participants' variable use of the complementiser that to introduce the sentential complement in sentences like Henry knew (that) Lucy/Louise washed the dishes was found to be related to whether that inclusion/omission resulted in an alternating sequence of stressed and unstressed syllables between the verb of the main clause and the subject of the complement clause. This finding is discussed in relation to the question of whether and how phonological encoding can influence grammatical encoding in spoken language production.
Repeated statements receive higher truth ratings than new statements. Given that repetition leads to greater experienced processing fluency, the author proposes that fluency is used in truth judgments according to its ecological validity. Thus, the truth effect occurs because people learn that fluency and truth tend to be positively correlated. Three experiments tested this notion. Experiment 1 replicated the truth effect by directly manipulating processing fluency; Experiment 2 reversed the effect by manipulating the correlation between fluency and truth in a learning phase. Experiment 3 generalized this reversal by showing a transfer of a negative correlation between perceptual fluency (due to color contrast) and truth to truth judgments when fluency is due to prior exposure (i.e., repetition).
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