“…It may be that outsiders have to be employed to collect the outcome information in order to avoid the bias involved when workers collect outcome data themselves. In some child care settings, small residential homes for example, outside help might prove less costly and more revealing (Levinson and Minty, 1992). If measures are regularly employed in monitoring exercises, however, and if the client completes some of the scales, and if there is a wide range of outcome measures in use, then the danger of bias may be reduced.…”