After visit @ , subjects were randomly assigned to @ of @ groups : ( @ ) group A , control ( usual care ) ; ( @ ) group B , treatment ( video peer modeling that involved watching a DVD recording of a typically developing child undergoing a dental visit ) ; ( @ ) group C , treatment ( video goggles that involved watching a favorite movie during the dental visit using sunglass-style video eyewear ) ; and ( @ ) group D , treatment ( video peer modeling plus video goggles ) .