everything Flashcards
describe what skill acquisition is?
the study of our ability to acquire and develop movement skills
verdict on brain training effectiveness?
FAR transfer limited as athletic ability not closely related to task trained so no evidence on improving athletic performance
only improve on same task or similar task requiring working memory in the lab
what are several factors which experts are found to be superior in compared to non-experts?
anticipation (aids limiting factor of reaction time)
sport-specific pattern recall
sport specific knowledge
automaticity of movement
what are some of the background findings about experts vs non-experts?
age - those born 3 months after beginning of season disproportionately represented in teams due to confidence and biological superiority e.g speed
geography - better when from rural areas (more likely to engage in unstructured practice)
type of training - putting in many hours of deliberate practice (physicaly demanding wiht goal of getting better) and unstructured play (relaxed with peers)
describe Williams et al.,1999 model on how experts perceive performace scenes?
with tennis relevant examples?
visual information - detection e.g watch serve - identification e.g way ball is going - decision making & response selection e.g which way to move to return ball
what is temporal occlusion and give an example of how it can be used to test anticipation?
footage/photos paused at different time before/after action
e.g Williams & Burwitz, 1993
shooting at goal
goalies asked to predict where the ball will end up from the cues available
generally experts more accurate with less info (i.e 120ms before kick as opposed to after kick)
what did Eriksen believe made someone an expert?
working at a specific challenging point doing ‘deliberate practice’ for certain amount of time
then you will become an expert
limitation of temporal as opposed to event occlusion?
temporal only tells us about time of extraction
not nature of info i.e which specific cues aid anticipation
what is event occlusion and give an example of how it can be used to test anticipation?
image shows only certain cues with others missing in order to isolate cues and determine whether they are necessary for anticipation of action or not
e.g Abernethy & Russel, 1987
experts and novices indicate final destination of shuttlecock
5 different conditions e.g racquet only and lower body only
found racquet and arm important anticipatory cues for experts
e.g Muller et al., 2006 did same with cricket bowl
what are the implications of anticipation skills for the perceiver?
and for the deceiver?
perceiver: to reduce temporal and event uncertainty
coaching players to be aware of relevant cues
deceiver: learn how to disguise event and temporal cues o increase uncertainty
what did Causer & Williams, 2015 find out about clothing deception when taking penalties?
had penalty takers wear 3 different kits (normal, zigzag or circles) which make it easier/harder to detect hip position before taking kick
found that skilled ppts struggled most to anticipate where kick going when zigzag then circle - more affected by deception but consistently better response accuracy
no differences between kits for non skilled
what did Jackson et al, 2006 find about deception in football which slightly contradicts Causer & Williams findings?
used temporal occlusion with footballer doing stepover (deception) or doing nothing at all and had to guess direction they would go
found novices more affected by deception as stepover likely to happen in football (as opposed to deceiving kits)
what is meant by the behavioural arms race?
anticipation vs deception
should someone be more attuned to cues, the player they are against has to have a better disguise
also if more attuned to cues then will be better at deception and other player has to have improved discrimination
what are some problems with occlusion testing which limits the current data?
tesing in lab enviros and using videos rules out physical nature of sport - no way of knowing if would be able to act on knowledge of e.g where penalty going in real time and no idea whether they’d pick up those certain cues in situ
situational probabilities in game play not replicated in studies e.g information of game play past and present and situational factors of stress
small screen so not a realistic view
loss of audio
describe a decision making test currently used to test athletes/youth players?
and a study which uses it?
Belling et al., 2015 filmed football games and asked coaches what would be most-least likely to happen next when stopped at a certain time
Kelley, 2018, tested kids at Exeter city and found higher performers generally better at deciding best next move so might help discriminate between better or worse players
how watching decision making video is a good exercise for task cohesion?
showing a team a video of a recent game and asking what should happen next
good for team cohesion as testing whether players come up with same answers to show they read play the same and understand the decisions undertaken by their teammates
what % of penalties are missed?
roughly 25%
what % of cases can goalies save the penalty?
roughly 18.8%
what did Savelsbergh et al., 2002 find about goalies and penalties?
life size projection of player taking penalty, wearing eye trackers and holding joystick to indicate where they’d go
experts 36% saved and novices 25% saved
experts 42% height and novices 32%
experts 84% side and novices 71%
experts had slower reaction time but less correction
longer fixation period (focusing on 1 thing)
experts fixate more on legs and ball whereas noices more on upper region hence why they may be less accurate as fixating on wrong cues
BUT holding a joystick might not be reflecting on reality
what did Dicks, Button and Davids, 2010 find about fixation in different situations?
had a number of different conditions including in situ, in situ with reponse, verbal, joystick all to do with saving penalties
intercept condition longer looking at ball, moving look at feet, verbal look at feet
statistics on where focusing when taking a penalty?
70% focus on keeper (Kuhn, 1998)
visually guided aiming says generally we look at what we hit to be more accurate
what did Wood, 2010 find about penalty taking and gaze?
- 3 types
- most accurate
3 types of gaze:
1) keeper dependent - look at goalie and make decision based on what they do
2) keeper independent - look where aiming
3) giving the eyes (opposite independent) - look one side and hit the other
accuracy:
KD less accurate as hit it closer to goalie (worse takers overly focus on goalie in all their kicks but also most common type of kick which may be due to goalie being source of threat so fixate on them when anxious), better to look at target to be more accurate e.g if move late then throws you off as unexpected
best is keeper independent as if hit it accurately keeper can’t save it anyway
what did Jordet find about penalty accuracy and motivations?
if your penalty means you’ll lose if you miss, only 62% score
if your penalty means you’ll win, 92% will score
in 1 the bad guy (threat as doubting abilities) and in 1 the hero (challenge as trusting oneself in the hard situation)
describe the attentional control theory?
Eysenck et al., 2007
anxiety increases focus on threatening stimulus (internal & external) and makes us explicitly monitor our surroundings
due to disruption in balance between attentional systems and overriding by bottom-up
2 attentional systems: (Corbetta & Shulman, 2002)
bottom-up: stimulus-driven for directing attention to salient/novel stimuli in ventral system
top-down: goal directed for response selection in dorsal system
what did Wood and Wilson, 2010 find about having a moving goalkeeper when taking penalties?
in trials where goalie moved - looked at and fixated on goalie much more than when not moving
looked at goalie more than goal when moving in high threat more than low threat - movement messes up attentional control
more misses and less accurate with threat and distraction
what did Wood and Wilson, 2010 find in their study about quiet-eye training and penalty taking?
control group just practiced
quiet-eye group given targets to hit and shown their eye tracker footage to see where fixating (should focusing on target)
penalty shoot out with eye trackers in front of all ppts with moving goalie - quiet-eye group focusing more on where trying to shoot so maintaining attentional control in threat situation and were more accurate than before training and than the other team
what does ‘control’ mean according to Skinner, 1996?
and what are the 3 aspects?
perception of one’s capacities to be able to cope and attain goals under stress
- contingency - perception of outcome uncertainty “what effect do i have on outcome”
- competence - perception of ability “how good am i”
- control - ability to achieve goal (score) and cope with pressure “can i deal with this situation”
how does eye-tracking work?
by working out gaze direction
by comparing the relative position of the pupil and the relationship between it and the corneal eflection (glint)
made easier by red illumination of eye producing ‘bright pupil’ effect
what is meant by eye fixations?
gaze is maintained on location for sufficient time to allow information to be processed
within 3 degrees of visual angle for 100ms or longer
(at least 180ms to see object and initiate simple movement)
what is meant by saccades?
eyes move quickly from one location to the other, jump which bring new part of visual field into foveal vision
60-100ms (fastest eye movement)
can’t pick up informaion during saccade (saccadic suppression)
what does a large number of fixations in a certain area tell us?
user’s interest in object when viewing a scene
what is the definition of gaze?
what is gaze duration?
number of consecutive fixations in an area of interest
gaze duration is total of fixation durations in a particular area
what is the scan path?
line connecting conecutive fixations
reveals viewers visual exploration strategies and very different in experts and novices
what is attentional blindness?
missing something in your field of sight due to focusing on certain aspects in visual field
difference in gaze behaviour between ronaldo and a non-expert?
ronaldo looked at ball and player to work out what they’re going to do and chooses his actions accordingly
non-expert looked at ball the whole time
difference in gaze behaviours between younger and older people?
younger look ahead at target whereas older look only a couple of steps ahead Uiga et al., 2015
what did Mann et al., 2007 find about experts vs non-experts gaze behaviour?
found experts used fewer fixations of longer durations (therefore taking in much more info and less internal and external distraction info as fewer saccades as well) and longer QE period (final fixation before action)
how to calculate search rate?
related to experts?
number of fixations / mean duration of fixation
experts have lower search rate as fewer fixations for longer durations so less saccadic suppression
what is meant by top-down visuomotor instructions?
when are they used?
these instructions dominate gaze behaviour in the performance of visually guided actions
task specific/goal-directed eye movements to support the planning and control of actions
dorsal attention
define quiet eye?
onset and offset?
final fixation or tracking gaze directed to a single location in the visuomotor workspace within 3 degrees of a visual angle for a minimum of 100ms
onset - before final/critical movement in motor task
offset - when fixation deviates off target by more than 3 degrees of visual angle for more than 100ms
why is quiet eye important?
hands and rest of body are controlled by brain which gets valuable information about what to do from eyes
brief window of neural networks being organised
so measure of visuomotor control
describe the differences in gaze behaviours between golf and basketball?
golf - keep eye on where ball was during and after putting
basketball - look at traget before throwing but after doesn’t matter where you look as ball restricts vision of target
what is the difference between ASL and SMI trackers
ASL = 1 eye
SMI - both
what are bottom-up instructions?
ventral attention
stimulus driven so directs attention to salient/novel cues, allowing distractions to be noted
what did Lebeau t al., 2016 find about quiet eye differences in experts and novices?
large effect size between experts and novices performing quiet eye and large effect size between quiet eye and performance
suggests duration of quiet eye period related to performance and difference between experts and novices suggests it should be trained as a factor in differentiating performance
what is found about quiet eye periods when under anxiety?
quiet eye period during the aciton e.g putt decreases when anxiety increases, showing breakdown of attentional control
what is the difference in purpose of QET between novices and experts?
novices - help with acquisition of the skill (& performance under pressure)
experts - help with refinement of skill (& peformance under pressure)
difference in novice skill acquisition when using QET compared to tecnhique trained?
performance and quiet eye better when QET during retentions and under pressure and skilled learned faster
technically trained group drop under pressure
suported by study by Vine and Wilson, 2010
what did Vine and Wilson, 2010 find regarding QET vs control in performance, QE duration and cardiac deceleration and muscular activity when under retention or pressure?
mean error rate constant and lower when QET and quiet eye duration consistantly longer whereas control error rate higher and increased during pressure situation, as well as quiet eye period less and decreased under pressure
also constant decrease in cardiac output just before skill performed (maintaining focus and not stressed) but increased then decreased but not to same level in control
also muscle activity lower in QET group indicating more efficient movement and minimum amount of contraction necessary to perform movement (measured by EMG)
none of these factors told about, just happened due to applying QET
what was found about quiet eye training in the military?
better rifle aim after QET despite being poorer than control orginially
findings regarding gaze behaviour in surgeons and novices?
how training of young surgeons can therefore be improved?
surgeons only looked at target
novices often looked at the impliments they were using or switched gaze between them instead of fixating on a location (similar to findings in a sports setting)
gaze, motor and no training (discovery), found gaze trained had fastest completion time whereas movement group even worse than discovery group
and multitasking task gaze group the best again
what did Vine, Moore & Wilson find about gaze behaviour improvement suggestions vs gaze behaviour watching back?
those taught how to perform QE better in holing putts in both retention and pressure situation
those who didn’t receive training had complete breakdown under pressure
also performed on an actual golf course so naturalistic not in laboratory
what are the 3 skills trained for pressure performance?
1) prepare - readying and imaging
2) perform - focusing external attention (quiet eye) and executing with a quiet mind
3) review - evaluating and feedback for next attempt
consequences of being poor at e.g throwing and catch and not participating in exercise?
self-select not to take part in activities
leads to obesity in adulthood as inactivity continues into adulthood
difference in quiet eye with low/high motor coordination kids?
low coordination i.e poor catch success exhibited much less quiet eye duration than those with high/medium motor coordination
(despite never having been taught about gaze showing gaze important in coordination)
what was found about children being given quiet eye training for throw and catch ability?
i.e gaze behaviour emphasised when watching ‘how to’ video
also used kids with dyspraxia/developmental coordination disorder so showed they can learn better attentional control - just about teaching it in the right way
measured qualitative as if simply can’t catch then range of behaviours shoud be noted to distinguish between missed catches
improved catching ability and lower elbow angle (good) for QET group when quiet eye period longer and earlier
in another study some children improved by 35% (QET) and general motor coordination improved as reported by parents
what are the 3 stages of motor learning as described by Fitts & Posner, 1967?
cognitive
associative
autonomous
what occurs at the cognitive stage of motor learning (stage 1)?
concerned with generic aspects of skill e.g what needs to be done and what goes where
knowledge is explicit and based on rules
dramatic changes in performance and is highly variable due to retaining successful and rejecting unsuccessful strategies
make lots of errors and obvious mistakes
what occurs at the associative stage of motor learning (stage 2)?
refinement of skill
performace changes more subtle and less variable
nature of cognitive activity changes (more emphasis on error detection than skill learning)
less obvious errors
what occurs at the autonomous stage of motor learning (stage 3)?
in this stage after months/years of practice
automation of skill and performed with less intereference from other tasks
knowledge is implicit and non-verbalisable so struggle to explain what they are doing as they aren’t thinking about it
little to no variability between trials
what is meant by declarative knowledge?
requires awareness, attention and reflection
consciously recalled
constant repition can transfer declarative to procedural knowledge
encompasses explicit knowledge required in cognitive learning stage
what is meant by procedural knowledge?
occurs without attention, conscious or awareness
developed slowly through repitition of an act over many trials under varying circumstances
what is working memory?
which motor learning stage is it particularly useful for
allows us to store useful information long enough to make a decision/perform an action
composed of phonological loop, visuo-spatial sketchpad and central executive
particularly useful for cognitive stage as need to store information temporarily to aid performance of action but may get overwhelmed due to only having a limited capacity
what are explicit processes?
rely on working memory for storage and manipulation
verbally based and open to introspection so conciously aware of info being processed
what are implicit processes?
unavailable for conscios inspection and difficult to verbalise
what is implicit motor learning?
accrual of motor skill without accumulation of, or at least conscious access to explicit knowledge e.g rules that underlie the performance of the skill
what is meant by reinvestment and when may it lead to choking?
turning one’s attention inward to the mechanics of one’s movement (explicit knowledge) so overthinking and not able to perform effortlessly
determined by 3 things:
1. performance context e.g seeing pressure as anxiety inducing or a challenge
- predisposition as measured by movement specific reinvestment scale: consciously processing motor movements and movement self-conscious questions
- degree to which underlying knowledge of the skill is accessible to consciousness as declarative knowledge - implicating that intial learning of movement should be implicit so no declarative knowledge to reinvest in
what are the findings regarding falling and reinvestment in older people?
reinvesting is positively correated with requiring more time to plan the movements and more foot placement errors
several factors to be able to tell if learning was implicit?
- fewer rules generated and can’t verbalise what they’re doing (lack of explicit verbal knowledge)
- smooth movement
- faster probe reaction times
- low coherence between motor planning and verbal analytical regions of the brain
- robustness to stress
- phenomenal sense of intuition (anecdotal)
describe the difference in coherence between T3/7 and Fz when implicit or explicit learning?
T3/7 where processing of explicit rules takes place (verbal-analytical)
Fz where execution of movement takes place (motor planning)
explicit - coherence (connection) between these regions as link between part thinking about and part performing rules
implicit - less coherence as don’t need access to part thinking about rules (T3/7)
name some mechanisms to create an implicit learning environment?
hence restricting build-up of declarative knowledge…
- loading working memory with a secondary task
- errorless learning
- analogy learning
others:
- no outcome feedback
- marginally perceptive outcome feeback
- quiet eye training?
- brain stimulation
what were the findings by Masters, 1992, regarding implicit learning and learning to putt?
used dual-task learning as a mechanism for implicit learning by asking ppts to generate random letters while learning how to putt, meaning they were unable to explicitly learn rules associated with putting due to a full working memory
shown to help them learn implicitly as had fewer explicit rules reported
implicit group learnt slower so performance progressed much slower but kept improving, even under pressure (more robust under psychological stress), whereas control and explicit group performance declined under pressure
cons with coaching implicit learning for coaches and learners?
leads to much slower learning so means coach has to spend more time teaching skill compared to normal
also, not everyone learning the skill will need to perform under stress so seems pointless learning implicitly to become more robust in situations they won’t be in
what is errorless learning?
findings suggesting how it may be implicit?
isn’t making no mistakes, but learning in a way to minimise mistakes
e.g when learning to putt, go further and further back when prove capable at a certain distance by making limited errors
implicit -
- less likely to analyse performance if performance was successful
Maxwell et al., 2001:
- performance less affected when performing a dual-task, suggesting not having to think about what they’re doing
- perform better under pressure, report fewer rules and better when attempting a novel distance
-Zhu et al, 2011 found increased coherence between T3-Fz when errorful over errorless learning
what was the finding regarding analogy learning in a clinical setting?
found that when Parkinson sufferers were told to walk like they were following footprints in the sand, they were able to walk in a faster and more stable manner
equally, with stroke patients, given analogies for walking e.g imagine you are kicking a football in front of you, found walking performance improved compared to before they were given analogies
who may benefit most from implicit and analogy learning?
implicit / errorless - those with low motor ability and explicit for those with high motor ability (Maxwell, Capio & Masters, 2016)
analogy - for novices, yet to master the action but not for experts who already have a specific way of performing the action
what may be another factor, other than reinvestment, leading to choking?
distractibility by external stimuli and focusing less on relevant stimuli
what are some advantages of reinvestment?
has advantages for picking up skill quicker when compared to implicit learning - implications for coaches and players who will never be involved in a pressure situation
‘somatic attention’
good for experts trying to get better by analysing their performance
good for experts trying to re-learn skills after injury
what is the five a model regarding experts re-learning skills?
Analysis Awareness Adjustment Automation (re-) Assurance
who first came up with theory of reinvestment?
Deikman, 1969 first proposed reinvestment theory as a way of unravelling automation of movement by reinvesting in actions and attention
describe the aim and findings of Vine et al., 2013 study on QET in golf putting?
- limitations?
- QET means to IML?
aim: investigate whether QET acts as a form of IML
findings:
QET group had decrease in error between retention and pressure whereas explicit showed increased and analogy showed no difference
limitations:
- analogy group given analogy which may have led them to focus attention internally as phrasing ‘arms swinging the pendulum of a clock’ instead of saying ‘club’
- inclusion of baseline may have focused attention inwards when high error rate so explicit rules considered
- no measure of external attention
- should have control group given no instructions to strengthen comparison
means to implicit?
PROS - less conscious awareness and explicit rules and reduced reinvestment and choking
CON- could be due to promoting external focus of attention focused on gaze instead of irrelevant stimuli
example of internal vs external focus when windsurfind?
internal - paying attention to how feet moving
external - paying attention to how board moving
found fell in less when paying attention to external cues
description of attention?
to do with concentration and focus
what we are thinking about/aware of
consciousness, awareness and cognitive effort (takes lots of cognitive resources)
attentional capacity limited
what is selective attention?
what does it depend on?
focussing on relevant environmental cues
ignore irrelevant cues
ability at doing this depends on:
experience
quality of instruction
arousal - anxiety
where should learners focus attention when learning a new skill?
direct learners to focus on the movement (external focus)
5 examples of attention not being directed appropriately?
what are the implications of this?
- reinvestment
- explicit monitoring - thinking about what doing instead of subconsciously
- ironic processing - try not to think about something but ends up being what you’re thinking about, leading to becoming more anxious
- hyperdistractibility - anxiety leads to losing focus as distractible
- constrained action hypothesis
important when considering instructions and feedback in skill acquisition environments
definitions or internal and external focus?
internal - focus on body movements
external - effect of movements on environment
is where you’re looking always what you’re paying attention to?
i.e does attentional focus = visual focus?
no, attentional focus may be thinking about feet on board but visual focus may be looking in front of him
what did Wulf, Hoß & Prinz, 1998 find in their internal/external attention study involving skiing?
supporting findings?
- effectiveness of movement
internal focus - exert force with outer foot
external focus - exert force on outer wheels (1 word difference between instructions optimal)
control group - no instructions
aim to get ski simulator from one side to the other whilst remaining balanced
found external focus lead to greater amplitude travelled (cm) in practice and at retention (without instructions) than control group and internal focus were the worst
suggesting external focus better than internal
supported by second experiment by these people finding that external group better at retention in stabilometer task - but markers in front of feet may have brough awareness to feet (why not so much improvement)
what did McNevin, Shea & Wulf (2003) in an updated version of the stabilometer for balance task measuring internal and external focus?
- effectiveness of movement
had 3 different marker positions and internal focus group
found better balance performance when markers aware from feet than when internal or near feet
further away from body you think about, the more effective it is so suggesting external focus better
what did Wulf & Su, 2007 find about internal/external focus instructions given in golf for skill accuracy?
ppts as novices
- effectiveness of movement
ppts were novices
internal, external and control group
shot from 15m away, found external group more accurate than control and internal
few confounding variables as changing 1 word in instructions i.e focus on swing of arms/club
what did Wulf & Su, 2007 find about internal/external focus instructions given in golf for skill accuracy?
ppts as experts
- effectiveness of movement
pitch shot to smaller target and given points based on accuracy
external focus group still better accuracy than controlled and internal
important as improving performance for athletes at the top of their game (control group were level they wer previously at)
issue with internal/external focus research regarding significance of results?
subject to publication bias as only publishing if significant result comparing internal to external, so may be quite a few studies not showing significant difference between the 2
combat this by sending study criteria, getting accepted, then publishing regardless of results
describe Wulf et al., 2001 constrained action hypothesis?
criticisms and limitations?
internal focus/attempting to consciously control one’s movements constrains motor systems by disruption of automatic control processes
external focus/focusing on movement effect promotes use of automatic control processes
limitation that novices don’t have these processes so why does it happen for them?
nothing in theory about how/why it works? - descriptive theory
probe reaction time evidence supporting constrained action hypothesis regarding internal and external focus of attention?
- automaticity of movement
shorter reaction time, better performance (fewer errors) and faster movement adjustment with external focus
implies reduced attentional demands and use of reflexive (automatic) control mechanisms
jump and reach task supporting constrained action hypothesis regarding internal and external focus of attention?
explanation for this from another study?
- efficiency of movement
Wulf, Zachry, Granados & Dufek
able to jump higher (increased power) and kinematics showed made movements more efficient when told to focus externally (on rung rather than finger)
found lower muscle activity with external focus (by using EMGs) which implies greater movement efficiency (Wulf, Dufek, Lozano & Pettigrew (2010))
what are the 5 categories that external focus advantages have been found for?
movement effectiveness e.g in football kicking accuracy movement efficiency e.g in running levels of expertise age groups disabilities
what did Wulf et al., 2010 find regarding internal/external focus study with children?
limitations with this?
external focus study told children to produce a ‘C’ when throwing football (limitation as may be implicit/analogy learning so may have been testing this instead and also instructions very different not just 1 word so may have been harder to understand etc. so confounding variables more likely)
found better when external
what did Chiviacowsky et al., 2012 find regarding internal/external focus with children with intellectual disabilities?
- effectiveness of movement
better throwing accuracy when external focus
important implications as good way of teaching movements
what have clinical studies found about internal and external focus?
Wulf et al., 2009, found external group with parkisons had less amount of sway (balance issues)
Fasoll et al., 2002, found stroke patients external group performed faster movement and more efficient when removing can from shelf and placing it on table
what was found about movement form in golf when focusing either internally or externally?
Wulf &a Kim, 2013
external focus led to X factor increase (stretch - good thing) and carry distance further
so focus changing mechanics of movement performed
what was found about movement efficiency and internal/external focus of attention?
limitation of this?
Zachry et al., 2005
internal (wrist) and external (basket - not result of movement so moving away from external focus towards something else e.g QET)
greater accuracy in external group and more efficiency in movemet (less muscular activity shown by EMG)
findings of Lohse et al., 2010 regarding movement efficiency in darts with internal/external focus?
external more efficient movement (less EMG activity), more accurate and faster movement
findings by Lohse et al., 2011 regarding internal/external focus?
what questions does it bring up?
better performance by external
ppts said aware of better performance when external focus
brings up question of whether external focus is the preferred and go to focus and therefore when making people focus internally are we making them going against what they automatically do - external not better just internal worse
what is the self-invoking trigger hypothesis?
mere mention of performer’s body provokes implicit, probably unconscious, access to the self
this self-focus may lead to self-evaluation and activate self-regulatory processes - and result in ‘micro-choking’ episodes
study by Ring et al, 2013 suporting self-invoking trigger hypothesis?
internal - vibration on hand
external - light on digital display
(may have caused gaze behaviour to change so confounding)
successful manipulation as attentional focus on ball less in internal and attention on grip much higher (self-report data)
external were better - associated with more accurate performance and reduced conscious processing