Activity Demands

The aspect of an activity, which include the objects and their properties, space, social demands, sequencing or timing, required actions and skills, and required underlying body functions and body structure needed to carry out the activity.

Object and their properties

Tools, materials, and equipment used in the process of carrying out the activity.
-Tools (e.g., scissors, dishes, shoes, volleyball)
-Materials (e.g., paints, milk, lipstick)
-Equipment (e.g., workbench, stove, basketball hoop)
-Inherent properties (e.g., heavy, rough, sharp, colorful, loud, bitter tasting)

Space demands (relates to physical context)

Physical environment requirements of the activity (e.g., size, arrangement, surface, lighting, temperature, noise, humidity, ventilation)
-Large, open space outdoors required for a baseball game
-Bathroom door and stall width to accomodate wheelchair
-Noise, lighting, and temperature controls for a library

Social demands (relates to social environment and cultural contexts)

Social environment and cultural contexts that may be required by the activity.
-Rules of game
-Expectations of other participants in activity (e.g. sharing supplies, using language appropriate for the meeting)

Sequence and timing

Process used to carry out the activity (e.g., specific steps, sequence, timing requirements)
1. Steps to make tea: Gather cup and tea bag, heat water, pour water into cup, and so forth.
1.1 Sequence: Heat wator before placing tea bag in water
1.2 Timing: Leave tea bag to sleep for 2 minutes
2. Steps to conduct a meeting: Establish goals for meeting, arrange time and location for meeting, prepare meeting agenda, call meeting to order.
2.1 Sequence: Have people introduce themselves before beginning discussion of topic.
2.2 Timing: Allot sufficient time for discussion of topic and determination of action items.

Required actions and performance skills

The usual skills that would be required by any performer to carry out the activity. Sensory, perceptual, motor, praxis, emotional, cognitive, communication, and social performance skills should each be considered. The performance skills demanded by an activity will be correlated with the demands of the other activity aspects (e.g., objects, space)
-Feeling the heat of the stone
-Gripping handlebar
-Choosing the ceremonial clothes
-Determining how to move limbs to control the car
-Adjusting the tone of voice
-Answering a question

Required body functions

Physiological functions of body systems (including psychological functions) that are required to support the actions used to perform the activity.
-Mobility of joints
-Level of consciousness

Required body structures

Anatomical parts of the body such as organs, limbs, and their components [that support body function] that are required to peform the activity.
-Number of hands
-Number of eyes