Teaching Critical Thinking in Psychology: A Handbook of Best Practices

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Are They Ready Yet? Developmental Issues


refer to the thinking of those who tend to see knowledge as certain and absolute and who


believe single correct answers exist for all questions. For people in stages 1 or 2, something


is true or it is false. Beliefs need little or no justification since there is assumed to be an


absolute correspondence between what is believed to be true and what exists. Accepted


authority figures know the truth, and one learns truth from them. Justification of beliefs


is thus primarily a process of repeating what one has been told. Students in these stages see


good teachers as those who unambiguously provide material for memorization and then


test that memorization. A student who is a prereflective thinker is mystified or angered by


being asked to analyze their thinking and justify their opinions. These students find criti-


cal thinking exercises and group work to be superfluous. They just want the right answers


and a good study guide so they can memorize the correct material for the test. They ask,


“Is this going to be on the test?” since anything not tested is unnecessary.


Stage 3 thinkers are a bit more advanced than stage 1 or 2 thinkers, albeit still prereflec-


tive. These students understand there may be areas in which knowledge is temporarily


uncertain, but all true knowledge is certain. Therefore, in areas in which knowledge is


uncertain, everything is “mere opinion.” For these students all opinions have equal author-


ity since no one knows the truth (yet). Thus stating one’s opinion is justification enough


for that opinion, since opinions just happen. They will say, “That’s just your opinion!” as


reason for discounting something someone says, or “That’s just my opinion” as justifica-


tion for their own view. The idea that opinions have reasons and can be better or worse


based upon supporting evidence makes little sense to them; they see no reason for critical


thinking. A stage 3 thinker may insist, “Until there is enough clear evidence to convince


everyone that evolution is correct, no one knows, and anyone’s guess is as good as anyone


else’s.” According to King and Kitchener’s (2003, 2004) data, the average high school


senior is at stage 2.7 and the average first-year college student is in stage 3 thinking.


Quasi-reflective thinking. Quasi-reflective thinking, stages 4–5, includes the recognition


that uncertainty is part of the knowing process. Students in these stages are able to see


knowledge as an abstraction, as constructed. This is a major advance in sophistication of


thinking. Now beliefs begin to be internally derived, not just accepted from authorities,


and evidence is an essential part of the knowing process and is an alternative to dogmatic


assertion. There is also awareness of alternative approaches and perspectives, and of con-


textual issues that dictate differing rules of evidence and different ways of framing issues.


In some ways there is a “swing of the pendulum”; students who are prereflective thinkers


tend to see knowledge as absolute and certain, while quasi-reflective thinkers may see


knowledge as relative and generally unknown and unknowable.


Stage 4 thinkers tend to see knowledge claims as idiosyncratic since all people have their


own perspectives and may see evidence differently or have access to different information.


Knowing has a strong element of ambiguity, since while beliefs must be justified by giving


reasons and using evidence, which reasons and which evidence matter is up to the indi-


vidual. Such thinkers tend to choose evidence that supports their prereflective beliefs


rather than hold those beliefs up to the light of evidence (e.g., young-earth creationism).


Stage 5 thinkers understand that differing opinions may be the result of differing con-


textual and subjective issues, but that certain contexts do have uniform rules for evidence


and judgments can be made. Stage 5 thinkers also understand that absolute truth may


never be knowable; only differing interpretations of evidence, events, or issues may be

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