Law of effect models and choice between many alternatives.

Data from five experiments on choice between more than two variable-interval schedules were modeled with different equations for the Law of Effect. Navakatikyan's (2007) component-functions models with three, four and five free parameters were compared with Stevens' (1957), Herrnstein's (1970) and Davison and Hunter's (1976) equations. These latter models are consistent with the generalized-matching principle, whereas Navakatikyan's models are not.