Step 1: Understanding the Concept:
Intellectual Disability (or deficiency), according to the American Association on Mental Deficiency (AAMD), is characterized by significant limitations both in intellectual functioning and in adaptive behavior, which covers many everyday social and practical skills.
Step 2: Detailed Explanation:
Based on the diagnosis, Rohan is likely to display the following two features in his daily functioning:
1. Deficits in Adaptive Behavior: This refers to the collection of conceptual, social, and practical skills that people learn so they can function in their everyday lives. Rohan might struggle with basic self-care (dressing, eating), communication, and social interaction with peers.
2. Sub-average Intellectual Functioning: This is usually identified by an IQ score of roughly $70$ or below. In daily life, this translates to difficulties in learning new tasks, problem-solving, and understanding complex instructions compared to other children of his age.
Step 3: Final Answer:
The two common features Rohan might display are difficulties in performing age-appropriate adaptive skills (like self-care) and a slower rate of learning or cognitive processing.