Dunker 1945
problem = arises when a living organism has A goal but doesn’t know now to achieve it
Eysenck & Keane 2020
Problem solving = purposeful, involves cognitive processes, only exist when someone lacks the relevant knowledge
Mayer 1931
Two string problem -need to tie string to another (can’t reach one string whilst holding the other string). Insight problem - requires one off solution (pick up an item to attach to string)
Tower of Hanoi
Each hoop can only go on top of a larger hoop. Aim to move hoop stack to other end. Non-insight problem - requires incremental and sequential problem solving
Jung-beeman et al., 2004
Right anterior superior temporal gurus was activated only when solutions involved insight
Representational change theory - Ohlsson 1992
Insight problems permit several mental representations (current representation is used to search memory for relevant info). Black occurs when representation is inappropriate- can bc passed by changing rep.
Elaboration = new info
constraint relaxation - extend ideas of what is possible
Re-encoding (e.g. pliers can act as weight)
insight often follows the formation of a correct representation
Kaplan & Simon 1990
Mutilated chess board (will dominoes cover? No)
Each domino covers a white and black (re-encoding)
Board has lost 2 white (re-encoding, elaboration)
Kneblich, ohlsson & raney (2001)
Match stick problem - IV = III - I
Moving single stick to make true statement participants focus on numbers not operates
Newell & Simon 1972
General problem solver - problems represented in problem space (starts with initial stare, ends with goal state)
complex problems - operators are chosen using heuristics -means-end analysis, hill climbing , based on thinking aloud during problem solving
Thomas 1974
Theories often only apply to restricted type of problem - real-life application? Individual difference?
Tendency towards being disruptive rather than predictive
Dunker 1945
Candle problem - arch candle to the wall without it dripping
Negative transfer - tack box is for holding tacks not candles (improves if tack box is empty to start)
Positive transfer - research focuses on analogical problem solving
Luchins 1942
Well practiced strategies are often used in inappropriate situations
Gick & Holyoak 1980
Stomach tumour problem with 3 stories convergence, open passage, surgery - story matched solution
Holyoak & Koh 1987
analogy group discussed radiation problem & control group did not
3-7 days later presented with target problem (lightbulb filament)
Woodworth & Sells 1935
people do not reason logically
Braine 1978
Abstract Rule Theory — people use abstract generalised rules (often derived from past experience)
Sometimes mistaken if lacking context
can be improved if presented additional clarifying info (Braine et al 1984)
over generalisation, misapplication of the rules, confirmation bias (only looking to info that affirms belief)
Johnson-Laird 1999
everyday comprehension processes (mental model) are used on reasoning problems
creating mental image to represent premise (reasoning involves examination of mental model and/or attempt to create an alternative model)
usually only falsify new models when initial one fails because too taxing (high mental load)
Newstead et al., 1999
mental models theory predicts people will consider more conclusions in problems where they must create more mental models (found no difference in number of conclusions considered between when 1 model or several)
Evans et al., review 2003
Dual systems approach
Fast, automatic, based on gut reaction (over reliance on instinct and emotional bias)
Slow, deliberate, abstract, based on logic (analysis paralysis)
Griggs & Cox 1982
Beer, Coke, 35, 19 — which cards need turning over to prove drinking age — 72% correct (increase because the info was more thematic so reasoning and context is greater
Wason
for deductive reasoning you need to be able to both prove the rule works and also that it isn’t violated (4 cards, how many turn over to prove rule and that rule isn’t violated — 4% correct)
Manktelow & Evans 1979
Haddock, gin situation (found thematic and abstract materials performed similarly)
Wason 2-4-6 task 1960
only 21% correct with first guess (assume its increments of two or even numbers etc), 70% correct in the end after testing several options
rule was has to be in ascending order (can’t test all the hypotheses to 100% guarantee this is the answer)
works the opposite of real life (this experiment — starts with own rule then have to expand to other potential rules, real life — starts with large range hypothesis & have to widdle down to one solution)
Tweney et al 1980
performance doesn’t improve when specifically instructed to use a disconfirmatory approach