# A Hyperbolic Cosine Latent Trait Model For Unfolding Dichotomous Single-Stimulus Responses

@article{Andrich1993AHC, title={A Hyperbolic Cosine Latent Trait Model For Unfolding Dichotomous Single-Stimulus Responses}, author={David Andrich and Guanzhong Luo}, journal={Applied Psychological Measurement}, year={1993}, volume={17}, pages={253 - 276} }

Social-psychological variables are typically measured using either cumulative or unfolding response processes. In the former, the greater the location of a person relative to the location of a stimulus on the continuum, the greater the proba bility of a positive response; in the latter, the closer the location of the person to the location of the statement, irrespective of direction, the greater the probability of a positive response. Formal probability models for these processes are, respec…

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