Body: Physical attributes
When we interact with today’s four major screen types — TV, PC, mobile, and tablets — we exhibit common physical attributes along two dimensions: session length (how long we view) and physical posture (literally). Other physical variables, such as screen size, viewing distance, and viewing environment (home, office, transit) highly correlate to those two.
Mind: Engagement style
A year ago, software designer Craig Will proposed a different approach to succeed Nielsen’s Lean Forward/Back paradigm, which he thought too simplistic and vague. He instead divided engagement style into absorption and activity levels. Think of absorption as representing retention resulting from focus, while activity is the frequency of user input.
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