Some individuals with intellectual disabilities do not respond to praise as a reinforcer, which may limit their ability to learn. We evaluated 2 procedures (stimulus pairing and response-stimulus pairing), both of which involved pairing previously neutral praise statements with preferred edible items, to determine their usefulness in establishing…

Background: Clinical trials of medications to alleviate the cognitive and behavioural symptoms of individuals with fragile X syndrome (FXS) are now underway. However, there are few reliable, valid and/or sensitive outcome measures available that can be directly administered to individuals with FXS. The majority of assessments employed in clinical…

We conducted three experiments to reproduce and extend Perone and Courtney's (1992) study of pausing at the beginning of fixed-ratio schedules. In a multiple schedule with unequal amounts of food across two components, they found that pigeons paused longest in the component associated with the smaller amount of food (the lean component), but only…

Training context can influence resistance to disruption under differing reinforcement schedules. With nonhumans, when relatively lean and rich reinforcement schedules are experienced in the context of a multiple schedule, greater resistance is found in the rich than the lean component, as described by behavioral momentum theory. By contrast, when…

Fixed momentary schedules of differential reinforcement of other behavior (FM DRO) generally have been ineffective as treatment for problem behavior. Because most early research on FM DRO included presentation of a signal at the end of the DRO interval, it is unclear whether the limited effects of FM DRO were due to (a) the momentary response…

Determining effective reinforcers for individuals with disabilities is imperative for skill acquisition and behavior reduction. Various methodologies exist to determine reinforcer preference, and past research has shown that results vary across different techniques. The purpose of the current study was to assess which presentation methods were…

Background: Self-injurious behaviour is commonly seen in Cornelia de Lange syndrome (CdLS). However, there has been limited research into the aetiology of self-injury in CdLS and whether environmental factors influence the behaviour. Methods: We observed the self-injury of 27 individuals with CdLS and 17 participants who did not have CdLS matched…

In order to maximize the learning of skills, it is crucial that the most powerful reinforcement be used. Research describes several different methods of reinforcement preference assessments, including forced choice, free-operant, and multiple stimulus array procedures. Researchers have also tested many variables to determine their potential impact…

The results of a functional analysis of problem behavior and a paired-choice assessment were compared to determine whether the same social reinforcers were identified for problem behavior and an appropriate response (time allocation). The two assessments were conducted in classroom settings with 4 adolescents with mental retardation who engaged in…

Reinforcement techniques for increasing the attention span of retarded students is investigated. (CD)

Two normal and two mentally retarded children were trained to earn pennies by pressing a key according to a multiple variable-interval extinction schedule of reinforcement. Retarded children differed from normal children by producing more positive than negative discriminative stimuli. (Author/DB)

MANY OF THE REPORTED BEHAVIORAL DIFFERENCES BETWEEN FAMILIAL RETARDATES AND NORMAL CHILDREN OF THE SAME MOTOR ABILITY ARE PRODUCTS OF A VARIETY OF DIFFERENCES IN MOTIVATION RATHER THAN PERMANENT EFFECTS OF MENTAL RETARDATION ITSELF. MANY RESEARCHERS, HOWEVER, HAVE TAKEN THE POSITION THAT MENTAL RETARDATES ARE INHERENTLY "DIFFERENT." THIS…

The effects of rate of stimulus presentation and reinforcement conditions on the two-choice discrimination learning performance of MA matched normal and familial retarded children were examined. (Authors)

Three groups of 36, institutionalized retarded, noninstitutionalized retarded and normal children equated on mental age were evaluated on a measure of psychological distance, the Sticker Family Game. Significantly less psychological distance was found between the child and parental figures in the retarded groups than in the normal groups. (Author)