Unit 4 – Cognitive Level of Analysis

1. Unit 4 – Cognitive Level of Analysis Day 1: Principles & Research

2. Outcome(s): • Outline principles and vocabulary that define the cognitive level of analysis • Explain how principles that define the cognitive level of analysis and ethics may be demonstrated in research

3. Agenda • Reading Quiz • Guided Notes – Cognitive Processes • Verbal Protocols Activity • The future of Cognitive Psychology? • Homework: Read 67-72 Course Companion

4. Thinking Map • Cognition

5. Cognition • Comes from the Latin word cognoscere, which means “to know”

6. Principles that define the cognitive level of analysis • Human beings are information processors and that mental representations guide behavior • Mental processes can and should be studied scientifically by developing theories and by using a variety of research methods • Social and cultural factors affect cognitive processes

7. Cognitive psychology: concerns itself with the structure and functions of the mind • Cognitive neuroscience: combines knowledge about the brain with knowledge about cognitive processes • Cognition: the mind is conceptualized as a set of processes including perception, thinking, problem solving, memory, language, and attention

8. Principle #1 – Mental processes guide behavior • One goal is to discover principles underlying cognitive processes • Bottom-up processing: information comes from sensory stem • Top-down processing: information is processed via pre-stored information in the memory • Stereotyping: people who have fixed ideas about other people – more prone to discriminate (we’ll focus more on this in upcoming days) • Reconstructive nature: people do not store exact copies, but rather an outline that is filled out with information when it is recalled • False memories: may sometimes happen when individuals cannot distinguish between what they have experienced and what they have heard after the event • Perception: cognitive process that interprets and organizes information from the senses to produce some meaningful experience of the world

9. Principle 2: the mind can be studied scientifically • Using scientific research methods • Theories, continuously testing • New findings result amendments to original models • Cognitive psychologists largely use the experimental method because it was assumed to be the most scientific method • However, the experimental tasks don’t always resemble what people do in their daily lives • Psychologists now study cognition in the laboratory as well as in daily context

10. Principle 3: Cognitive processes are influenced by social and cultural factors • Frederic Bartlett • Schema: a mental representation of knowledge • Distortions – people remember in terms of meaning and what makes sense to them, so memory is subjective • Therefore, it needs to be investigated scientifically

11. Will it ever be possible to develop robots that can think like humans? • Work in partners and compare the human mind and the computer. Make a list of what the human mind can do and what the computer can do. Discuss your list; does it make sense to you to compare the human mind to a computer? • What do you consider to be the major difference between the computer and a human being? • Discuss how computers are pictured in one-science fiction film that you have seen. • Discuss whether you think it will ever be possible to construct a robot that can be exactly like a human.

12. Studying the mind • Research methods at Cognitive LOA • Laboratory – all variables can be controlled; however, may suffer from artificiality • Case studies • Technology (ex: CT, fMRI) • Use data to support or refute cognitive models, or to propose new models

13. Cognitive processes • Cognitive schemas • http://www.youtube.com/watch?v=mzbRpMlEHzM • Memory researchers believe that what we know already affects the way we interpret events and store knowledge in our memory

14. Schema Theory • Schema – “how-to-score knowledge” • Schema theory: cognitive theory about information processing • Cognitive schema: networks of knowledge, beliefs, and expectations about particular aspects of the world • Distortions – mistakes

15. Schema theory and memory processes • Used to explain memory processes. Memory processes divided into three main stages • Encoding: transforming sensory information into a meaningful memory • Storage: creating a biological trace of the encoded information • Retrieval: using the stored information Encoding Storage Retrieval

16. Research in Psychology: Anderson and Pichert (1978) • Aim: To determine the influence of schema processing on both encoding and retrieval. • Method: Participants heard a story which contained information about a house. Half of the participants were asked to adopt a home-buyer schema when hearing the story, and the other half, a typical burglar schema. A distracting task was performed for 12 minutes before testing recall. After a further 5 minute delay, half the participants were then given the alternative schema (i.e. home-buyers were given burglar schemas and vice versa), and the other half were asked to retain their original schema, and recall was retested. • Results:Points directly linking to alternative schemas increased by 10%, whilst those relating to previous schemas declined. • Limitations: completed in a laboratory, so issues of ecological validity arise

17. Evaluation of Schema Theory • Cohen (1993) • Says concept of schemas is too vague to be useful • Daniel Gilbert • “brain is a wonderful magician but a lousy scientist”

18. Can you… • name the seven dwarves…..

19. Was it easy or hard? • It depends on several things…. • If you like Disney movies? • When was the last time you have seen the movie? • Are people around you being loud pain in the butts so you cannot concentrate?

20. Recall Versus Recognition Recall Recognition • you must retrieve the information from your memory • fill-in-the blank or essay tests • you must identify the target from possible targets • multiple-choice tests

21. The Working Memory Model • Atkinson and Shiffrin (1968): among the first to suggest a basic structure of memory • Multi-store model

22. You need to pay attention to something in order to remember it, and you need to give the material a form (code) which enables you to remember it. Rehearsal means keeping material active in memory by repeating it until it can be stored.

23. Sensory memory • Modality specific – related to difference senses • Short-term memory (STM) – around 7 items, duration about 6-12 seconds (#s better than letters) • Long-term memory (LTM): vast storehouse of information

24. Working Memory: Badeley and Hitch (1974) • Baddeley and Hitch (1974) • Working memory model

25. Central Executive – “controlling system” • Slave systems: short-term storage systems dedicated to a content domain (verbal and visuo-spatial, respectively) • Attentional control – the central executive’s most important job. This happens in two ways • Automatic level: based on habit and controlled more/less automatically by stimuli from the environment • Supervisory attentional level: deals with emergencies or creates new strategies when the other ones are no longer sufficient

26. Episodic buffer • Phonological loop • Phonological store • Visuospatial sketchpad

27. Evidence of Working Memory • Dual-task techniques: interference tasks • Baddeley and Hitch (1974) – asked participants to read prose and understand it, while at the same time remember sequences of numbers. In dual-task experiments, there was a clear and systematic increase in reasoning • Findings show that even though there was impairment, it was not catastrophic • Multi-tasking – performing different cognitive tasks at the same time without disruption

28. Pickering and Gathercole (2001) • Working Memory Test Battery for Children • There’s an improvement in performance in working memory from 5 years until about 15 years • Problems with working memory are associated with problems in academic performance

29. Holmes et al. (2008) • Association between visuospatial sketchpad capacity and children’s mathematics attainment in relation to age • Children ages 7-8 and 9-10 • Older children – mathematical performance could be predicted by performance on visual patterns test

30. Long term memory (LTM)

31. Memory & the Brain • Biological factors in memory • Neural networks • Lesioning • Explicit memory • Semantic memory • Episodic memory • Implicit memory • Procedural memory • Emotional memory • Hippocampus • Amygdala

32. Clive Wearing – brain damage • 1985... contracts viral encephalitis • Damaged parts of his brain... affected memory • Memory span of a few seconds... unable to keep conversation or go places • fMRI scans showed extensive damage to both the right and left hippocampus... and some frontal regions • Provides insight into the biological foundation of different memory stems – episodic memory and some semantic memory lost • Distributed memory system • Emotional memory – affection he shows for wife

33. Milner and Scoville (1957) • Amnesia • HM – head inury sustained when 9 • Epileptic seizures • Removed tissue from temporal lobe, including hippocampus • HM unable to form new memories • Suffers from anterograde amnesia, can’t remember faces of people he meets (like Wearing) • MRI in 1997 - damage not as extensive as estimated • Much better chance of testing areas of the brain related to memory and skill learning

34. Ethics in Research • HM and Clive Wearing are famous case studies in cognitive psychology. HM has been studied extensively, with all kinds of tests, ever since his operation in 1953. He has even donated his brain to science when he dies. We do not know his identity. Clive Wearing’s identity is known to us due to his wife’s book. • Discuss why participants in case studies are anonymous • Discuss ethical considerations in studying an individual with an interesting disorder or brain damage, such as HM and Clive Wearing

35. Verbal Protocols • Verbal protocols involve trying to make internal thought processes into public rather than private events – thinking aloud. This is a form of interview. • In pairs • Partner 1: participant • Partner 2: listening, jotting down steps in the problem solving process • The problem: D O N A L D + G E R A L D R O B E R T

36. Clay Shirky: How cognitive surplus will change the world • http://www.ted.com/talks/clay_shirky_how_cognitive_surplus_will_change_the_world.html