Thursday, June 25, 2020

Cognitive bias in school-based research

Cognitive bias in school-based research

In developing a culture of research at Veritas MAT, I have been thinking about how we can best support our staff team in spotting bias in their own research and in the research of others.

Cognitive bias
Heuristic – providing a simple and often imperfect answer to a difficult question (Kahneman, 2011)

I love the work of Daniel Kahneman and if you haven’t read his book, Thinking Fast, Thinking Slow it is a worthy read for anyone engaging in reviewing literature or indeed working in school leadership. Here is a link to a previous blog I wrote on slow leadership.

Research is riddled with heuristic. While the Cambridge English Dictionary defines heuristic as a method of learning or solving problems that allows people to discover things for themselves. There is a wider caution of heuristic in school-based research. The heuristic is described by Kahneman as providing ‘a simple and often imperfect answer to a complicated question’. An example of this would be to respond to the question posed by a work colleague, ‘how are you?’ with the standard and benign response ‘Fine.’. If we are to use some slow thinking, we would delve, and ask a question that would proffer a more fulsome response. We could encourage the respondent to dig deeper into their response by asking ‘are you equally happy about all aspects of your work life?’. This may ask the responder to go beyond their initial heuristic of ‘Fine’ and they may then be prompted to speak more widely about their job role, their relationships with their team leader, their frustrations about appraisal, their joy of teaching music to a group of pupils and so on. Challenging our school-based researchers to go beyond the heuristic is key in broadening their understanding of their field of study.

In his book Thinking Fast, Thinking Slow, Kahneman talks of lazy thinking. His book is truly worthy of a read for any researcher considering the effects of bias on their own research and the research of others. He outlines two systems of thinking. Genuinely, I’m not making money on sales of his book. The first system depends on heuristic. This lazy thinking allows someone to answer a complex question swiftly without engaging in deep thought.  It is in this system of thinking that our cognitive bias runs riot and we come to decisions based on our current thinking or little thought at all.  Just like the respondent above who answered ‘fine’ when asked ‘how are you?’. In becoming increasingly aware of cognitive bias, and in particular, recognising bias in your own and in others, your researcher will become increasingly deep thinking.  They will move their thinking from lazy system 1 thinking into deep system 2 thought where the multifaceted threads of their field of study will start to present themselves.

I share these cognitive biases with my early career teacher research group to help them to develop an awareness of their own bias and to spot bias with increasing accuracy in the research they encounter. Knowledge of cognitive bias is also invaluable as a school leader as a shared understanding of cognitive bias in a senior team opens out the breadth of discussion you can have with one another.   I will now draw on some of the cognitive biases outlined Kahneman’s book.

Availability Bias – WYSiATi

Availability bias is rooted in our natural response to answering a difficult question. It operates on the assumption that we already know all there is on the topic being discussed. Put in simple terms by Kahnaman, he uses the acronym WYSiATi to represent ‘What You See is All There is’. This sums up the availability bias in us all that we often assume that we know all there is to be known on a given subject when forming our response.

An example of availability bias operating in a school can be seen in this scenario. One senior teacher, observing the behaviours in a teacher’s class states, ‘ Jane’s teaching seems to be deteriorating – she has a tough class – she clearly isn’t coping well with the pupils.’. Jane’s team leader is trapped by some lazy thinking and their availability bias is blocking them from thinking more deeply about what is not known. When questioned, Jane’s work colleague states, ‘Jane has changed her teaching strategies recently and is off curriculum as she needs to plug concept gaps for the students who have now entered Year 10 after a Year 9 where six supply teachers led to poor progression for the students.’ Further to this, when Jane is questioned about the issue the leader finds that Jane has noted the students have poor collaborative skills so has mixed up previously established groupings to help build resilience in the students prior to their accelerated programme for GCSE. While this has unsettled the students in the short term, causing low level disruption, it is a strategy to support progress in the long term.

As you can see, in the assumption that what you know is all there is, the understanding of Jane’s rationale for her classroom management would go unseen. By working through this cognitive bias, the senior leader is in far better position to support Jane to get the very best from her students.  This also works in the field of research, and in particular when forming the research question and engaging in reviewing the evidence relating to your researcher’s field of study. We need our researchers to be aware of availability bias in both themselves as researchers and in the research and ideas presented by others. We do this by asking if  what you see is all there is ?

Confirmation Bias

Confirmation bias is where we seek out only that which confirms what we already know or think. This is seen in the associations we unconsciously make. For example, if you buy a new car, without warning the road is full of drivers in that same car. Our brains are hard-wired to recognise and make sense of patterns and connections. Because of this, we often subconsciously ignore anything that does not support our view of the world. Confirmation bias is important to recognise in the research of others as well as in our own research and our professional lives.

So, how does confirmation bias appear in schools and in research? Let us consider the following statement, ‘Mrs Jones gets great results in her maths GCSE by grouping students by gender’. Being aware of confirmation bias, what are the assumptions in the statement? One assumption would be that gender segregation has resulted in the great results. A second assumption could be that all students in Mrs Jones' class achieve these great results.  A third assumption may link to the quality of teaching delivered by Mrs Jones, who may have a range of interpersonal skills that lead to high engagement for all her pupils. I could go on.  Without thinking more deeply about the wider factors, the researcher could use this statement to simply confirm what they already think about gender grouping, asserting that gender segregation in the teaching of maths is the key factor for the results achieved by students.

Sunk cost fallacy

Sunk cost fallacy describes a bias where you continue blindly doing something because you have invested time or money in it. You see this in someone who goes to the theatre to see a play and finds it to be the most tedious experience ever. They reach the interval but head back to their seat after because they have paid for the ticket and although they are not enjoying the experience, continue as they don’t want to waste the money spent. Taking this bias into the school environment, we may hear a school leader say when questioned by their staff on the value of the digital assessment system in place, ‘we have been using this assessment system for five years. We have invested time and money in the system and it produces super graphs of students’ progress.’. 

Then a keen member of the senior team states, ‘Is there a better solution to manage the time our staff are spending entering data into the system?’. With sunk cost fallacy engrained unconsciously in the school leader’s mind, they respond by saying,  ‘We have been using this assessment system for five years. We have invested time and money in the system and it produces super graphs of students’ progress.’. 

‘But,’ retorts the keen teacher, in a desperate attempt for the school leader to see the folly of their thinking, ‘The current assessments on the system are no longer in line with the new exam board’s expectations.’. The senior leader then responds (yes you’ve guessed it) ‘Seriously, do you know how much time it took us to train our teachers to use this system and what the set up costs were? We have been using this assessment system for five years. We have invested time and money in the system and it produces super graphs of students’ progress.’. The school leader is resolute, even though the wider evidence suggests the current system is no longer fit for purpose.

Sunk cost fallacy is an unconscious bias in us all and you will find this also in research articles, books and rooted in the practice of colleagues. You need to alert your researcher to listen for evidence of sunk loss fallacy as this is often used as a key argument for opposing organisational change in schools. As such, research can sometimes be wrongly used to validate the status quo and obstruct the evolution of new practice within our schools.

Group Bias – if all around you agree, it must be true.

Group bias is an unconscious bias that relies on the social convention that if all around you agree, it must be true. An example of group bias is seen in the story of the Emperor’s New Clothes where the Emperor is convinced by his aides that while his new robes are invisible to him they are visibly the finest and most luxurious stately robes  to all around him. As his subjects were all too scared to admit to the Emperor was in fact naked, the Emperor himself believed what was blatantly not true. Group bias is a powerful and convincing bias and has caused atrocities to take place across the world as groups of people and nations hold biased, yet unfounded viewpoints.

In the field of research, group bias can be seen where groups of people gather with similar viewpoints. This is often the case on social media where groups of like-minded or like-opinionated people meet. Forming a bubble of understanding. In order to dispel this bias, a lone voice in the group needs to ask a challenging question, ‘ but what would others who may disagree with our perspective say and on what information would their opinions be founded?’ This is an important bias for your researcher to challenge when undertaking their evidence gathering relating to their research question.

Over confidence Bias

‘In the modern world the stupid are certain while the intelligent are full of doubt.’ Bertrand Russel
Find someone who has an absolute view on an issue and therein you are likely to find over confidence is a bias. This is also linked to the Dunning Kruger Effect, that stupid people are too stupid to recognise their own stupidity. (Kahneman, 2011). It is over confidence bias that can lead a selection panel to appoint the most enthusiastic candidate and then find they are not capable in the roles and responsibilities of the job. To counter over confidence bias, we need to help our researchers to understand the simple principle that the more we know, the more we know we don’t know. Also, to watch out for over confidence in the evidence they use to deepen their understanding of their field of study.

Anchoring effect

Your researcher also needs to be alert to the dangers of being blinded by big numbers. The anchoring effect (Kahneman, 2011) is a cognitive bias that connects a false validity to research outcomes because the number appears significant. Remember the importance of the p level or Cohen’s level in academic research which clearly quantifies the significance of the research. An example of the anchoring effect is seen when shopping and you spot a pair of shoes for £120. You then spot a similar pair for £60 and you immediately feel you have found a bargain. In using your initial reference point of £120, you naturally assume that this is all the information you need and come to the conclusion that £60 is a great price to pay. However, there is a danger of referencing your conclusion to the first or limited piece of information you have, as it may well be that the shoe at £60 is also over-priced and a wider search of other shops give a much broader picture of the value of these shoes.

Another example of the anchoring effect is seen in the staff room when introducing a new school initiative with colleagues. It is often the voice of caution or dissention that will speak out first in a discussion. The response usually starts with the word ‘but…’. The anchoring effect comes into play and it is then very hard to argue against the first comment made, particularly if this is a negative comment presented with conviction. The negative comment then becomes the ‘anchor’ to all other thinking on this issue and the conversation and wider possibilities of a deeper discussion considering all the perspectives available is hindered. Your researcher needs to be alert to the anchoring effect as they may come across a convincing and compelling argument from a member of staff when investigating their field of study. If they are convinced by the first strong opinion they meet, they may not deepen their understanding of the wider perspectives of others.

Halo Effect

The halo effect is similar in ways to the over confidence bias. It depends on an unconscious bias that we are drawn to believe someone who is deeply enthusiastic about their viewpoint or has a track record of performing well. Teachers are more likely to grade a student’s essay favourably if the student has a track record of writing well. David Didau puts it in this way when writing about the achievement of boys in English exams, ‘Do we expect girls to be more compliant and achieve better than boys in school? Are boys and girls treated differently in school and wider society? We expect girls to be made of sugar and spice and all things nice while boys are unwashed louts. Might we be making it easier for girls to achieve in schools because of the expectation we have of them?’ (Didau, 2015).

Be on your guard

As we strengthen our researcher’s capacity to review evidence relating to their research question, we need to draw their attention to the powerful influence of unconscious cognitive bias. In learning more about bias in other’s work, they become increasingly erudite at spotting this bias in themselves and as such, strengthening their objectivity when engaging in their own research.

Didau, D (2015) What if everything you knew about teaching is wrong? Crown House Publishing 
Kahneman, D (2011) Thinking, fast and slow. Penguin

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