Smiles and Praise Alone Can Teach Children With Autism Joint Attention

A smile and a few words of praise may be all it takes to help young children with autism learn one of the most fundamental building blocks of human communication. A new study published in the Journal of Autism and Developmental Disorders reports that contingent social stimuli—smiles and verbal praise delivered immediately after a correct response—were sufficient to increase responding to joint attention in all six children tested, without the need for toys, snacks, or other tangible rewards that have long dominated behavioral interventions.

Joint attention, the shared focus of two people on the same object or event, typically emerges in infants between eight and fifteen months of age and serves as a developmental gateway to language, social referencing, and perspective-taking. Children with autism spectrum disorder (ASD) frequently show delays in the components of responding to joint attention, or RJA, including eye contact, gaze shifting, and pointing. Because these deficits ripple outward into later language and social development, researchers have long sought efficient, practical ways to strengthen them.

The study, conducted by Martha Pelaez of Florida International University, Carolyn Crysdale of Endicott College, and Katerina Monlux of Oslo Metropolitan University, asked a deceptively simple question: can social consequences alone—praise and smiles delivered contingently—increase joint attention responses in five- and six-year-old children with ASD, and how do they compare with social stimuli paired with tangible reinforcers? Previous work suggested that for children with autism, social stimuli might need to be explicitly conditioned with primary reinforcers before they could support learning, and most prior interventions relied on edibles or toys.

To answer the question, the researchers used a single-subject multiple treatment reversal design with counterbalanced treatment order. Three children completed the sequence baseline, social-only treatment, withdrawal, and social-plus-tangible treatment, while three others received the treatments in the reverse order. Across sessions held in a public kindergarten classroom in Florida and two early intervention clinics in Florida and Maryland, children sat across a table from an interventionist with three upside-down plastic cups, one of which concealed a small toy car. Each trial began with the cue “look at me,” after which the interventionist shifted gaze toward the target cup and returned eye contact. A correct response required the child to make eye contact, follow the gaze shift, re-establish eye contact, and point to the correct cup within thirty seconds.

In the social-only condition, correct responses were followed immediately by a smile and the praise “Good job.” In the combined condition, the same social consequences were delivered simultaneously with a tangible item such as a small toy. During baseline and withdrawal phases, no reinforcement or prompting was provided. Sessions lasted roughly twenty to thirty minutes and included four to six blocks of ten trials each, with interobserver agreement coded on 39 percent of sessions and procedural fidelity averaging 100 percent on checked trials.

The results were striking in their consistency. Every participant increased one or both components of responding to joint attention during the contingent social-stimuli condition relative to baseline and withdrawal phases. Gaze shifting and pointing percentages rose substantially across children: one boy’s gaze shifting climbed from a baseline mean of 27 percent to 63 percent under social reinforcement alone, while another child’s gaze shifting rose from 37 percent to 87 percent, reaching ceiling levels of 100 percent in some sessions. A girl included in the sample, who showed limited gaze shifting despite high pointing accuracy, improved her gaze shifting from a mean of 68 percent to 93 percent in the combined condition.

Notably, the social-plus-tangible condition often produced the highest levels of responding, but not invariably. Two children performed as well or slightly better with social stimuli alone, and the relative advantage of the combined condition varied across participants and response components. The authors emphasize that the principal contribution of the study is not that tangible stimuli enhanced responding, but that contingent social stimuli by themselves were sufficient to produce meaningful gains—a finding that challenges the assumption that tangible reinforcers are necessary for teaching joint attention to children with autism.

The researchers interpret their findings through the lens of conditioned reinforcement and stimulus control. Social stimuli such as smiles, praise, and eye contact do not acquire their behavioral effects independently of experience; through repeated pairings with feeding, comfort, play, and assistance during early development, initially neutral social events can become conditioned reinforcers. Because the children in this study had histories of interacting with teachers and clinicians who delivered praise, the contingent social consequences likely already functioned as reinforcers. The timing mattered as well: praise was delivered specifically after the child completed the full response sequence, strengthening the temporal and functional relation between the child’s gaze shifting, pointing, and the social outcome.

The findings also align with developmental accounts of joint attention, particularly the distinction between responding to joint attention, which is tied to attention regulation and the processing of externally generated social cues, and initiating joint attention, which reflects self-generated social motivation. By strengthening children’s ability to discriminate, follow, and respond to another person’s attentional directives, the intervention may expand each child’s access to socially mediated learning opportunities beyond the structured session itself, complementing operant and developmental perspectives at compatible levels of analysis.

The authors acknowledge limitations, including the small heterogeneous sample, the absence of follow-up sessions to assess maintenance and generalization, and the inclusion of one participant without a formal ASD diagnosis. Each treatment condition was also implemented only once per child, leaving open questions about sequence and carryover effects. Still, the practical implications are considerable. Before adding toys or edibles, practitioners may wish to assess whether a child’s existing history has given smiles and praise reinforcing value, since a separate formal conditioning phase may be unnecessary for many learners. Future research, the team suggests, should directly evaluate which forms of social stimulation function as reinforcers for individual children, examine whether improvements in joint attention translate into language gains over time, and test caregiver-implemented versions of the procedure in homes and classrooms where joint attention naturally unfolds.

Subject of Research: Using contingent social stimuli as reinforcers to increase responding to joint attention in children with autism spectrum disorder

Article Title: Increasing Joint Attention in Children With Autism Using Contingent Social Stimuli as Reinforcers

Article References: Increasing Joint Attention in Children With Autism Using Contingent Social Stimuli as Reinforcers. (n.d.). https://doi.org/10.1007/s10803-026-07524-9

Image Credits: AI Generated

DOI: 10.1007/s10803-026-07524-9

Keywords: autism spectrum disorder, joint attention, responding to joint attention, gaze shifting, pointing, contingent social stimuli, social reinforcement, tangible reinforcers, conditioned reinforcement, applied behavior analysis, early intervention, children with autism