Eye Tracking and Decision Making Flashcards
Vision
Visual system is… centrally implicated in learning, higher-order, cognitive affective processes, decision making and its behavioural implementation and co-ordination
Building on First Impressions - Does the halo effect always apply?
Fang, Singh & Ahuluwalia (2007)
232 participants from University of Kanvas
Procedure: Banner ads on the web page being read changed regularly
Participants saw target ads 0, 5, or 10 times
Participants rated ads after reading the web page
The more you like something initially, the more halo effect builds.
The mere exposure effect
Zajonc (1968) – the automatic increase of appeal through exposure to stimuli
Mere exposure effects in advertising
Lindgaard’s (2006) experiments – appeal decisions made reliably in 50 ms
Supporting evidence from research on perception – Oliva’s work
Limitations
Can create halo effects
To build on halo effects you need to like a website/advertisement first.
Just & Carpenter (1980)
Proposed the eye-mind hypothesis.
No appreciable lag between what is fixated and what is processed.
Pieters, Wedel & Rosbergen (1997, 2004)
- 73 seconds – the average time that consumers examine adverts [range of
- 37-5.30 seconds]
0-0.5 seconds - First fixations are usually on the pictorials, on the region that is more informative
0.5-1 second – large cluster of fixations on key text/editorial or subsidiary picture (all participants still looking at this stage)
1-4 seconds – exploring the editorial or pictures in more detail (50% of participants still looking)
5-20 seconds – sequences of fixations indicate reading.
Cowen, Ball, & Delin (2002)
Looked at measures used for eye movement measurement.
Number of fixations
Total fixations
Average fixation duration
Fixations spatial density - Global measure of total amount of processing performed on each page.
Scan paths
These are looked at most ^
Different measures online
Lindgaard et al (2006)
Rated liking for 50 web pages seen for 50 millisec
Rated again a 2nd time to check reliability
Rating were reliably the same on 2nd occasion
Mcdougall, Goodliffe, Ollis & Taylor
Do user evaluations of informativeness take longer?
Avg no. of fixations 500ms = 1.15
Reasons given for evaluations are the same even when only 1-2 fixations are possible
This may be the result of retro-fitting ‘reasons for decisions’ to task demands
BUT they are not based on changing patterns of eye fixations
Mere exposure effects - scene gist capture
Olivia et al (2004,2005,2006)
Found that the gist of a scene can captured in a single glance/fixation
This includes both ‘bottom-up’ information – colour, surface, volume – and ‘high-level’ information – objects, semantic knowledge activation
Thus, gist is captured ‘at a glance’ at both perceptual & conceptual levels
Decision making as a problem-solving process
Problem Recognition
Information Search
Evaluation of Alternatives
Pros and Cons
Heuristics
Product Choice
Outcomes
Multi Attribute models
They are extremely popular with market researchers.
Attributes – those which consumers usually take into consideration when evaluating a particular product
Beliefs – the extent to which a consumer thinks a brand has a particular attribute
Importance weights – the importance of each attribute for a consumer (this may vary considerably between individuals)
Multi Attribute models
Information makes it possible to
This information makes it possible to:-
Spot weaknesses in the brand profile
Capitalise on advantages which the product already has
Strengthen key product-attribute linkages
Create new unique selling points if required
Multi-attribute models – mismatches between predictions and behaviour
Fishbein (1983) – created the first, and most influential, attribute model
Other models have been created to improve the predictability of the model
These models include:-
The theory of reasoned action (Ajzen & Fishbein, 1977)
The theory of planned behaviour (Ajzen, 1991)
Multi-attribute models – mismatches between predictions and behaviour
Mismatches between predictions based on multi-attribute models and questionnaires arise because:-
There can be differences between intentions and actual behaviour
Social pressure may change our intentions or behaviour
Models concentrate on the evaluation of the product rather than evaluating what consumers feel about buying it (e.g. if the shop is far away or unpleasant)
Models also need to include what consumers feel about websites when shopping online
Attitudes can change for a variety of reasons (e.g. culture, shopping on-line, age)
Evaluation of Alternatives
The product alternatives a person considers compromise their evoked set.
Members of the evoked set usually share some characteristics; we categorize them similarly.
The way a person mentally groups or categorises products influences which alternatives he or she will consider.
Usually we associate some brands more strongly with these categories.