Objectives: Sensory processing patterns refer to a person’, s ability to receive and respond to sensory events which are important to succeed in daily routine activities. This study aims to determine the sensory processing patterns in infants/toddlers. Methods: This is a cross-sectional study. A total of 518 infants/toddlers participated in this study. Their ages ranged from birth to 36 months. Parents completed the infant/ toddler sensory profile for all participants. Results: No significant difference was observed between girls and boys in sensory processing from birth to 6 months,however, there is a significant difference between girls and boys in low registration, sensory sensitivity, and sensory avoidance from 7-36 months. In addition, no significant difference was detected between children born by cesarean and those born through natural childbirth in terms of sensory processing (quadrants and scores) from birth to 6 months and 7-36 months. There is a significant difference between preterm and full-term children (birth to 6 months) in auditory processing. The findings also indicate only a significant difference in oral sensory processing between the preterm and full-term children (7-36 months). Discussion: We discussed sensory processing patterns in children and their differences based on different factors. The results of this study can provide considerations for Iranian occupational therapists and psychologists.

Background and Aim: The current study aim-ed to investigate the validity and reliability of the Persian version of the Infant-Toddler Mean-ingful Auditory Integration Scale (IT-MAIS) questionnaire. Because cochlear implantation is done today at younger ages, the use of a suitable questionnaire is necessary to evaluate auditory skills and follow up the rehabilitation progress. Methods: IT-MAIS was translated according to the International Quality of Life Assessment (IQOLA) translation protocol. The content vali-dity was performed using Lawshe method with the participation of 10 expert professionals. The questionnaire was completed for 34 parents of cochlear-implanted children before initial prog-ramming of the device, two weeks after the reh-abilitation program, and finally three months later. The intraclass correlation coefficient was calculated for test-retest reliability for each IT-MAIS subscale. The internal consistency reli-ability was analyzed using the Cronbach α coe-fficient. Results: The content validity ratio for all items was above 0. 79, and the content validity index was obtained to be higher than 0. 96. The Cronbach α for the entire questionnaire was 0. 74, and for different sections of it was obtai-ned as 0. 63‒ 0. 67. A significant difference was observed between the total score of the ques-tionnaire before and after the rehabilitation pro-gram and its sub-items (p < 0. 001). Conclusion: The Persian version of the ques-tionnaire of IT-MAIS is a valid instrument in terms of translation quality as well as reliability and validity for assessing cochlear implant user children who are younger than three years.