“…Deficits in children's attention are problems in facilitating, sustaining, or disengaging these relationships apart from the specific environmental event. Thus, attentional problems may be deficits in sustaining or disengaging the behaviors in relation to the environment (Barkley, 1994; (Drewe, 1975 (Barkley, 1990;Braswell & Bloomquist, 1989;Reid & Harris, 1993) and, more recently, the development of attention-training strategies (Sohlberg & Mateer, 1987; Thomson, 1994;Williams, 1987 (Pfiffner & Barkley, 1990;Pfiffner & O'Leary, 1987;Rosen, O'Leary, Joyce, Conway, & Pfiffner, 1984), response cost (Atkins, Pelham, & White, 1990;Cocciarella, Wood, & Low, 1995;DuPaul, Guevre-mont, & Barkley, 1992;Evans, Ferre, Ford, & Green, 1995;Gordon, Thomason, Cooper, & Ivers, 1991;Rapport et al, 1987), home-school contingencies (Abramowitz & O'Leary, 1991;Kelley & Carper, 1988), and peermediated contingencies (Carden-Smith & Fowler, 1984;Gresham & Gresham, 1982;Lentz, 1988).…”