Cognitive Approach Studies Flashcards
Aim of Loftus and Palmer
To investigate whether the use of leading questions (specifically different verbs) would affect participants’ estimation of the speed of vehicles in a car accident.
Participant makeup of Loftus and Palmer
45 student participants, divided into 5 groups of 9.
Films watched in Loftus and Palmer
7 short films of traffic accidents.
Questionnaire content in Loftus and Palmer
A questionnaire including 1 critical question about the speed of the cars.
Verbs used in Loftus and Palmer
Smashed, collided, bumped, hit, contacted.
Average speed estimate of the ‘smashed’ group
40.8 mph.
Average speed of the ‘contacted’ group
31.8 mph.
Conclusion of Loftus and Palmer
The wording of the question influenced memory recall, suggesting that memory is reconstructive.
Aim of Brewer and Treyens
To investigate the role of schema in the encoding and retrieval of episodic memory.
Participant makeup of Brewer and Treyens
86 university psychology students.
Office items in Brewer and Treyens
Participants were told to wait in an office containing both schema-congruent items and schema-incongruent items.
Example of a schema-congruent office item
Calendar.
Example of a schema-incongruent item
Skull.
Recall time in Brewer and Treyens
After 35 seconds, participants were moved to a room and asked to recall what they saw.
Ways used to recall objects in Brewer and Treyens
Written recall, verbal recognition, drawing recall.
Recall scores in Brewer and Treyens
Written recall and verbal recognition (30), Drawing recall (29), Verbal recognition (27).
Schema-congruent items recall in Brewer and Treyens
Schema-congruent items were more frequently recalled across all conditions.
Conclusion of Brewer and Treyens
Memory is influenced by schemas during both encoding and recall.
Aim of Loftus and Palmer Broken Glass study
To investigate whether post-event information (the verb used in the speed estimate question) would influence participants’ memory of an event.
Participant makeup of Loftus and Palmer BG
150 students, divided into 3 groups of 50.
Speed question wording in Loftus and Palmer BG
Group 1 was asked about speed using the word ‘smashed’ and group two was asked about speed with the word ‘hit.’
Time frame for asking about broken glass in Loftus and Palmer BG
Participants were asked 1 week later if they had seen broken glass (none was present in the film).
Speed estimate and broken glass recall in Loftus and Palmer BG
The speed estimate of the smashed group was 10.46 mph, and 16 participants said they saw broken glass.
Loftus and Palmer - speed estimate of the hit group
8.00 mph, 7 participants.