TOUCH Tactile Sensitivity Pressure Sensitivity Thermal Sensitivity
Tactile Sensitivity		Minimize the need for tactile differentiation.
Impaired ability to locate and identify textures as surfaces. An impaired ability to retain a hold on to small, smooth objects.
		Minimize the need for tactile differentiation by offering alternative visual and/or audio messages. If tactile identification messages are required, either to stand alone or as redundant cues, use a distinctive texture and/or shape for each set of message units.
Pressure Sensitivity		Provide definitive pressure "feedback" cues.
Possible inability to detect/sense pressre.		Differentiate significant shapes, surfaces, and increments of controls with appropriate forms and textures. Ensure that the resistance of push buttons gradually builds up and then drops suddenly upon actuation. Ensure that selector switches "snap" into pre-determined positions for non-analog applications.
Thermal Sensitivity		Prevent possible thermal injury .
Possible inability to detect thermal stimuli.		Shield hot and cold thermal sources (e.g., light bulbs, hot water pipes, refrigerant coils) from accidental contact by a user. For potentially dangerous thermal applications (e.g., range burners, ovens, etc.), reduce chance of injury by offering redundant cues (e.g., lights, symbols, sound) for providing additional "feedback".

Rationalizations can no longer excuse designs of products or environments that fail to attract and accommodate any segment of the population.

Content courtesy of "Guidelines and Strategies for Designing Transgenerational Products," suported, in part, by Grant number 90-AT-0182, from the Administration OIffice of Human Development Services, Department of Health and Human Services, Washington, DC 20201, and the All-University Gerontology Center, Syracuse University.