“…This is not to deny that some behavioural changes may be health enhancing, and that programmes that sponsor behavioural change can have positive effects on risk factors (see eg. Bennett and Carroll, 1990;Bennett, Wallace, Carroll, and Smith, 1991;Chesney, Black, Swan, and Ward, 1987) and disease end points (see eg. Friedman, Thoresen, Gill, Ulmer, Powell, Price, Brown, Thompson, Rabin, Break Bourg, Levy, and Dixon, 1986).…”