Initial Efficacy Study of Supporting Play, Exploration, & Early Development Intervention

Problem-solving behaviors were assessed using the Early Problem Solving Indicator (EPSI). The EPSI is the cognitive subtest of the Individual Growth and Development Indicators designed to measure infant and toddler play-based problem-solving through 36 months of age. It defines problem-solving as consisting of visual exploration, object manipulation and memory. The infant was video-recorded interacting with 3 standard toys: pop-up animals toy, 6 seriated, plastic cups, and a gum ball machine with 5 balls. Infants were given each toy for 2 minutes. The frequency of 4 mutually exclusive behaviors (look, explore, function, solution) were coded using definitions from the EPSI protocol. time. The total number of problem solving behaviors was calculated as a sum of look, explore, function, and solution for each infant at each visit and reported as the total EPSI frequency with a higher frequency reflecting more problem solving behaviors.

Time frame: End of intervention, 1 and 3 months post intervention

Population: Same as primary population with the 2 infants lost to follow up not included.

Duration the infant is in contact with the target is used to quantify changes in reaching.

Time frame: 1 month post intervention

The Bayley-III is a norm references standardized developmental assessment of Motor, Cognitive, and Language skills. Composite scores for each domain have a mean of 100 and a standard deviation of 15. A score of 85-115 is considered average. Higher composite scores represent higher or better performance on that subtest. The Bayley was administered at the final follow-up visit and 3 months after the intervention ended.

Time frame: 3 month post intervention

Population: At 3 months post intervention the sample was consistent with that described in the study sample post lose to followup.

The Early Feeding Skills (EFS) was used to assess the infant's oral feeding skills during the video recorded feeding described above. The EFS is a 26-item observational tool that can be used from the start of oral feeding through the maturation of feeding skills. Each item can score 1-3 with one representing the least skill or high frequency of problem (an area of clinical concern), and three representing mature skill or absence of problem (area of strength). Subscales included were ability to maintain engagement in feeding, ability to organize oral-motor functioning, ability to coordinate swallowing, and ability to maintain physiological stability. The sum of all the items in a subscale divided by the number of items in the subscale gives the subscale score of 1-3. The sum of all subscales was used to create an EFS total score which could range from 2 to 12 with a higher score reflecting a better feeding performance.

Time frame: Baseline, End phase 1, End of intervention, 1 and 3 months post intervention

Population: Some infants were not able to orally feed in which case this measure was not included. In addition, some visits were missing feeding assessments for missing data. Thus the sample included varied some between visits.

The Parent-Child Early Relational Assessment (PCERA; Clark, 2010; Clark, 1999) was designed to assess mother-infant interaction. In this study PCERA was scored from a video of the feeding interaction. The PCERA is a 65-item observational rating scale (29 parental, 27 infant, and 8 dyadic), designed to assess the amount, duration, and intensity of interaction. Each item was rated on a 3-point ordinal scale with 1-2 indicating an area of concern, 3 indicating an area for some concern and 4- 5 indicating an area of strength. Eight subscales constructed from items of the PCERA have been theoretically derived and confirmed by factor analysis (Clark, 1999; Clark et al., 1997). For ease of analysis this scale was transformed to a -1 to +1 range. Scores were recorded as 1 or 2 = -1, 3= 0, 4 or 5 = 1. The total PCERA score is the mean of all the subscale mean scores and ranged -1 (highest risk of atypical interactions) to +1 (most positive interactions).

Time frame: Baseline, End phase 1, End of intervention, 1 month post intervention

Population: The sample varied some between visits do to a lack of video taping the parent child interaction on a few occasions because the parent who consented to the study was not present at the time of the visit and the visit could not be rescheduled. The 3 month post intervention visit was dropped.

The TIMP is a standardized and norm references test of motor control and posture in infants 4 months of age and younger which is commonly used with infants starting at 34 weeks of post-menstrual age. Change in raw score from baseline to end of the intervention is reported. The TIMP raw score ranges from 0 to 142. A higher score represented greater performance in motor control and posture.

Time frame: Baseline to End of intervention

Population: Full Sample after infants lost to follow up who are not included in this analysis.