Affordances are defined as possibilities for actions we may potentially perform in our environment. It is our perception to decide between all possible actions the surroundings allow.
Actions potentiality is motor feasibility in which the context reveals the actions to be performed. It is the complementarity of the environment’s physical properties and our perception. We perceive the environment possibilities for action on the basis of what we are physical and psychologically capable of doing (Gibson, 1952). To this author, the mountain’s space and objects are perceived in relation to their affording action’s potential.
In skiing, a slope would be perceived as ‘skiable’ for skiers with a certain level and other slopes would be not. This theory constitutes a basic principle understood as opportunities offered by the environment. It unifies our perception of the environment’s physical properties with our action possibilities these properties offer, being interpreted as incentives to act.
Applications of Skiing Affordances
When we observe the environment not only observe its characteristics but also the possibilities for action it allows. Snow properties or slope tilt are perceived not only by their structure, hardness, or difficulty but also by the possibility they offer for sliding, turning, jumping, accelerating, or stopping.
To reach an efficient way of skiing, we must be capable of perceiving different action possibilities since our intention to perform them depends on those possibilities. Our cognitive representation of potential actions is decisive in selecting and orientating future actions. Once we realized the possibility of executing an action, we should resolve two central problems at the same time: ‘what to do’ to determine the action mode and ‘how to do it’ to determine action regulation.
As affordances are interactive links between us and the environment, we perceive them as references used to evaluate actions’ feasibility according to our intentions and the environment characteristics as snow firmness, slope inclination, terrain irregularity, snow friction, or surface texture. These possibilities are taken as action proposals: the environment ‘suggests’ all available actions. The perceived properties will allow us to decide which actions will be executed. For example, we perceive affordances at a trail crossing allowing directly crossing or we may perceive that traffic situation prevents to cross by modifying our trajectory or motion speed.
We do not only perceive objects properties (snow texture, ground surface, slope configuration) but also the performing possibilities according to those objects’ affordances. It is not the amount of snow that matters to us or how wide or inclined a slope is but what we can do with those features.
Action potentials are characterized by what snow and terrain mean or, said in another way, by the practical value related to previous experiences we immediately associate with possible actions. The beginner merely perceives terrain characteristics while the expert skier perceives further action opportunities offered by a particular area.
Objects in the environment have a controlling function of our actions. These objects would have an action mental representation to facilitate its implementation so the mountain could be exploited.
Affordances relate also to action planning since, during descent planning, we must deliberate what does the terrain, slope, snow, or traffic conditions allow to select then which parts of the slope choosing or avoiding, where to turn and where not to.
If we apply the Affordance theory, we assess not only the mountain particularities as height, amplitude, distance, inclination, texture, or terrain relief in physical units but would also do it in relation to our own characteristics of weight, height, technical level, and psychophysical condition.
Perceiving Affordances
For Gibson, affordances are perceived directly and do not require internal processes. This direct perception would be possible because of the environment information we visually perceive and can thus determine affordances availability. For this author, there is reciprocity between the performer and his environment, forming a constant combination.
Affordances are individually perceived by each of us, interpreting a particular meaning of the environment offerings, evaluating the ‘skiability’ of certain slope or snow type. Affordances may not be perceived or wrongly perceived, as snow surfaces may be recognized as firm but not supporting our own weight so we sink in it. Also, we should recognize equipment affordances, i.e., our skis’ action possibilities according to their geometric and mechanical characteristics.
Perception is based on our corporeal and mental properties information since we would perceive environmental features in relation to ourselves, directly perceiving snow and terrain utility and their practical meaning to determine what is convenient of doing.
To perceive a slope is to perceive the actions we can perform on it and how it can be done. Perceiving affordances could be considered as ‘invitations’ to act, it is perceiving utilities and possibilities but these are independent of perceiving since we may or may not perceive them.
Framework Matrix of Skiing Affordances
| Skiing Concept / Technique | Environmental / Equipment Affordance Property | Biomechanical Capability & Regulation | Tactical Speed / Line Selection | Cognitive Representation & Decision Response |
| Motor Feasibility Perception | Surrounding space and mountain objects | Integration of physical and psychological capacities | Selection of line based on perceived skiable terrain | Deciding between all possible actions the surroundings allow |
| Environmental Complementarity | Interlinked physical properties of the mountain | Structural adjustment of body to match slope constraints | Mapping potential trajectories based on terrain limits | Unifying raw perception with actionable incentives to act |
| Slope Skiability Rating | Pitch, tilt, and vertical profile of the slope | Level-specific motor control execution on steepness | Matching trail difficulty with current technical execution | Cognitive evaluation of terrain as either skiable or unskiable |
| Snow Property Identification | Snow structure, hardness, and internal density | Force application adjustments to match snow resistance | Modulation of acceleration based on base surface feedback | Interpreting physical snow traits as direct options for sliding |
| Slope Tilt Assessment | Angular inclination of the trail face | Angular adjustment of feet, knees, and hips to the slope | Deciding entry speed into turning, jumping, or stopping phases | Translating mountain angle into a specific action proposal |
| Dual Problem Resolution | Dynamic terrain layouts and obstacles | Regulation of precise body movements (“how to do it”) | Strategic selection of the specific action mode (“what to do”) | Simultaneous calculation of tactical intent and mechanics |
| Interactive Reference Links | Surface irregularities and terrain wrinkles | Dynamic balance correction over bumps and compressions | Micro-line adjustments inside highly variable corridors | Evaluating real-time feasibility against intent and terrain |
| Snow Firmness Evaluation | Resistance profile of the underlying snowpack | Edge pressure distribution to prevent washing out | Speed maintenance over packed versus soft surface transitions | Choosing edge angle depth based on perceived snow support |
| Terrain Irregularity Tracking | Unmarked trail humps, dips, and rolls | Active flexion and extension absorption mechanisms | Speed regulation inside troughs and over crests | Utilizing terrain shapes as physical reference points for actions |
| Snow Friction Management | Friction coefficients of wet, dry, or fresh snow | Fore-aft pressure shifts to counteract sudden deceleration | Adjusting gliding line to compensate for suction or grabby snow | Anticipating glide variations across changing snow textures |
| Trail Crossing Navigation | Crossing paths, traffic density, and skier flow | Rapid braking, edge setting, and speed scrubbing | Modification of descent trajectory and velocity through the zone | Real-time traffic analysis to cross directly or alter paths |
| Practical Experience Mapping | Snow texture and localized ground configuration | Deployment of automated motor habits from past skiing | Matching speed vectors to familiar terrain arrangements | Associating immediate terrain views with past success data |
| Beginner Feature Tracking | Isolated, literal terrain characteristics | Rigid, defensive body positioning on changing surfaces | Fixed, unyielding line choice regardless of opportunities | Linear perception of terrain with no alternative action paths |
| Expert Opportunity Discovery | Extended, subtle features of a particular area | Fluid, precise execution of complex technical gestures | Creative, high-speed line variations across complex slopes | Disclosing hidden action opportunities inside a single zone |
| Object Controlling Function | Mountain boundaries, markers, and natural objects | Triggering specific neuromuscular motor schemas | Tactical route manipulation using physical markers | Exploiting objects via active mental action representations |
| Descent Action Planning | Traffic conditions, slope width, and snow cover | Anticipatory muscular priming before turn execution | Deliberate selection of parts of the slope to choose or avoid | Strategic deliberation of where to turn and where not to |
| Self-Referential Assessment | Mountain height, amplitude, and relief scale | Weight, height, and physical leverage utilization | Speed thresholds scaled to current psychophysical condition | Assessing physical units of the mountain relative to oneself |
| Direct Visual Perception | Visually available environmental information | Immediate motor system pairing without cognitive delay | Constant maintenance of the performer-environment reciprocity | Extracting raw optical data to determine action availability |
| Weight Support Verification | Crust strength and variable snow surfaces | Instantaneous weight distribution adjustments across both skis | Speed management to float over non-supporting breakable crust | Detecting and correcting misperceived snow firmness states |
| Equipment Affordance Recognition | Skis’ geometric sidecut and mechanical flex traits | Coordinated leg inclination matching the ski’s turning radius | Maximizing carving speed by exploiting ski design limits | Continuous awareness of the ski’s action possibilities |
| Convenience Determination | Direct utility and practical meaning of the terrain | Real-time execution of the most efficient technical gesture | Optimization of line and speed for energy conservation | Instant translation of slope cues into invitations to act |
