Lecture 32- Problem solving Flashcards
What are the characteristics of achieving insight into a problem?
-insight is a process: -first impasse, looking at it, what is it? -suddenly you get it, it feels like something, element of certainty= represents a pattern of brain activity
What were the two examples of insight we discussed?
-the largest prime number= proof by contradiction -the different types of infinity (real numbers)
What are the two examples of elemental insight-related problem solving?
-The compound remote associate problems (CRAP) = what word can be joined to the words and makes sense -Bongard sets= classification problems, look for what makes the set a set
Where does classification happen in the brain?
middle of the temmporal lobe= classification structures
How to determine brain activity during problem solving?
-EEG as you can get very good temporal resolution
What were the alpha and gamma signatures of the insight and non insight group(these just told the result)?
-there is a difference in the alpha band between the insight and non insight group -small difference in alpha activity -gamma range = the more coherent brain wide pattern -big difference at around the time people came up with the soution
What does the gamma activity signify in problem solving?
-gamma activity when it happens= is association of different parts of the brain
What are the conditions for insight?
-so when insight: 1.have the analytical phase 2.then if you relax and defocus, and restrategise= that is associated with the possibility of coming up with a solution= the gamma burst= gets more synchronous with other parts of the brain -all of this can be monitored with EEG, the Eureka moment is associated with gamma activity= controversial
What is meant by top down executive control?
–preconceptions, the mental model we have= top down processing -conscious thought is a subset of cognitive activity: the brain knows more than it lets us know -when you have some idea what you are looking for much easier -the dalmatian picture
What is gesture use like in humans?
when talking with gestures the same part of brain lights up as when using tools -tool use, gesture and language seem in some way interrelated-images of tools but not animals or people activate language areas in people
When was the first tool use in people?
-first seen in the fossil record 2.4 MYA in Homo habilis -other animals also use tools but they don’t have creative vocabulary of tool use- they don’t make tools that are used to make other tools
What did the first tools look like? (Oldowan)
-ad hoc simple ones -the ones you can find
What were later tools like?
-1.8 MYA Acheulean bi-faced tools, more sophisticated -200 000 years ago Levallios tools show a vocabulary of tools, additional technologies such as use of strings -these demonstrate the ability to plan to the future -require a temporal structuring of behaviour and the creation of intermediate solution prior to the final solution (Levallios)
What part of the brain are you using when classifying tools?
the ability to classify is not prefrontal
- inferior temporal region (like the face recognition)
- the ventral pathway
- prefrontal activity involved in tool use as well
- areas 45 and 47 are important for naming objects
- 44 45 is broca’s area
- you classify in inferior temporal then name and know what it does via prefrontal cortex
- here more conceptual representation
How do we solve practical problems/concrete operations?
1: From objects: superior temporal gyrus, fusiform gyrus 2: via the ventral stream 3: to objective conceptualization: BA 45-descriptive representation, BA47- symbolic potential = there is a divide in what hemisphere represent what- left: quantitative/parametric; right- objective /iconographic -evidence suggest that Broca’s area (the 45 and 47 roughly) organizes not just language but similarly organizes body movements in relation to motor learning and communication -organises our motor control in relation to objrct we interact with