Abstract
Laabs (1975) has argued that Marteniuk's (1973) negative findings in opposition to his (1973) model can be explained by a lack of power. While statistical power was low, Marteniuk's results, and those of Jones (1974) as well, demonstrated a very small difference that was contrary to one of Laabs' predictions. It can be concluded this difference was not practically meaningful, suggesting that the Laabs (1973) model may have to be modified.