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Does perceived steepness deter stair climbing when an alternative is available?

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Area of Science:

  • Psychology
  • Biomechanics
  • Human Factors

Background:

  • Perception of hill slant is exaggerated in explicit awareness.
  • Proffitt argued that explicit perception of climb slant aids locomotion planning, but behavioral evidence is lacking.
  • Stair climbing avoidance is more prevalent among women, older adults, and overweight individuals.

Purpose of the Study:

  • To investigate if perceived steepness of stairs acts as a cue for avoidance behavior.
  • To examine demographic differences in stair avoidance and perceived steepness.
  • To provide behavioral evidence for the role of perceived slant in locomotion planning.

Main Methods:

  • Two studies were conducted: one estimating staircase steepness in a train station (n=269), and a follow-up in a shopping mall (n=229).
  • Data collected included demographic information (sex, age, height, weight) and perceived steepness of stairs.
  • In the second study, participants were recruited based on stair usage (choosing stairs vs. escalator) and estimated steepness from a life-sized image.

Main Results:

  • Women, older individuals, and heavier/shorter individuals perceived stairs as steeper.
  • Pedestrians who avoided stairs by choosing escalators reported them as steeper, even after controlling for demographics.
  • Perceived steepness emerged as a significant contextual cue influencing stair avoidance when alternatives were present.

Conclusions:

  • Perceived steepness of stairs is a key factor in avoidance behavior, particularly when alternative routes like escalators are available.
  • This finding supports the role of perceived environmental properties in guiding locomotion and decision-making.
  • The study provides behavioral evidence for the influence of explicit perception on action planning in built environments.