In part 7 from this knowledge-rich study, we go back and look at stage 2 in ridiculous detail so strap in and put your brain on!
- Stage 2 consists of action selection/execution + action/selection between response options with both being based on the assessment of the current situation from stage 1 where the player must decide which action to make
- The decision-making process is a competition between response options with the starting point being comparison of the current play situation to representations of similar situations in long term memory
- Through experience, certain actions are linked to positive/negative outcomes in particular situations
- For experts the situational assessment is highly specific, implying that very few actions (and sometimes only 1) are associated with it
- Neural populations in the brain’s motor systems related to each of these actions are activated at the beginning of stage 2 but as only 1 action can be carried out, the actions compete for selection and this competitive process constitutes an implicit evaluation of response options that results in the selection/execution of an action
- There are 2 main determinants of the evaluation being how closely the present situation matches similar patterns in long term memory and this matching also includes the player’s current proprioceptive state and readiness to perform certain actions + how strongly the different actions have been linked to these patterns/player’s response biases
- By integrating these 2 factors, the selection process can combine present information with previous experience to maximise the probability for a successful outcome of the chosen action and the selected action also implies an expectation of its likely outcome, based on previous learning, which feeds into stage 3 (assessment of outcome/feedback-based learning)
- For experts, the action selection process occurs at an unconscious level since decisions need to be made fast/intuitively to take advantage of dynamic opportunities as they occur in a game which is different for novices where conscious deliberation is more prominent
- Greater level conscious processing with more deliberation time typically reduces the quality of decisions
- Conscious thought is restricted by working memory capacity but unconscious processing can evaluate several choice options simultaneously and in any given game-situation multiple response options are relevant bit it is highly unlikely that each option is sequentially considered/weighted against others within consciousness as it would take too long
- Since response selection is based on the situational assessment it is difficult to determine if poor decision making is due to poor response evaluation or if the evaluation was accurate but based on a poor situational assessment
- Response selection processes at stage 2 relates to motor decision making being dependent on a competition between populations of neurons representing different movement options in a fronto-parietal system that integrates sensory, memory and motor related information as the current situation is perceived, triggering response options based on past experiences of similar scenarios
- The relevant response options compete and while neurons within populations representing the same action will excite each other, neurons from different populations tend to exhibit each other
- Eventually 1 neural population reaches a critical activation threshold, out-competes the others and the associated action is executed
- Structures in the basal ganglia may function as gatekeepers for response selection in this process with the competition being resolved based on an ongoing analysis of costs, risks and rewards
- This affordance competition theory suggests less familiar scenarios/fewer available good solutions tend to produce slower decision making via the lower activation in neuronal populations when the match between a current situation and stored representations is poor due to limited previous exposure to such scenarios + reaction times on decision tasks generally increase with the number of relevant options available via the fiercer competition between neural populations that will inhibit each other when no obvious decision presents itself
- In both cases it will take longer for a neural population to reach the activation threshold resulting in a slower response
- This may explain the "take the 1st" heuristic that suggests a skilled player will typically pick the 1st viable response option that presents itself and could reflect behavior in scenarios that have become so familiar that response evaluation entails almost no competition and a highly practiced motor response can be initiated almost immediately
- Decision making is a continuous process representing an ongoing interaction between environment and actor and in-game decision making corresponds more closely to what can be termed embodied decision settings where the environment is constantly changing and affords new response options in a way that blurs the lines between perception, decision and execution
- Individuals executing a motor response will sometimes suddenly change their minds and switch course mid-action when new information presents itself and makes another response more beneficial which highlights that both situational assessment and action selection continues well into motor execution
- Action selection is continuously on-going and each processing stage is updated as new perceptual/cognitive information becomes available
- This situational assessment from stage 1 will continue to update and bias response selection in stage 2 and even after motor execution has begun, a new decision may reach the activation threshold and change motor behavior in another direction
- Difficulties in reaching a decision at stage 2 may initiate more explorative behavior at stage 1 to provide sufficient information for the decision so the 2 stages function in an interactive manner v traditional decision making models of perception then decision then execution
- Motor competence is the ability to execute a particular movement pattern - is a precondition for action selection for example a bicycle kick is not a move every player has and requires very specific motor skills which implies that the neural/bodily activity required for it is not activated in stage 2 for such players but given appropriate physical fitness it may be altered by the training of that skill in which case the option of it can then enter stage 2’s action selection in relevant situations
- A motor representation of a bicycle kick now exists in the player’s procedural long term memory from which it can be activated by relevant situational cues perceived at stage 1
- Stage 2 is a competition between response actions in which activated options are evaluated based on a match between the situational assessment, stored situational representations and the strength of associations between these representations and the specific actions involved in competitive decision making + action selection is a continuous process that regulates decisions all the way until they are carried out