Monthly Archives: October 2017

When in doubt, change your answer?

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Have you ever taken a test and put one answer down but the more you think about it, the more you think you should change your answer? Should I stick with what I originally thought or should I change it? What if I change it and my first answer is the right one, that would be so frustrating but what if I do change it and I get the correct answer? What should I do? This is what I am going to explore in this blog, what should you do?

Below is a video that will give you an overview of what I am going to discuss.

Supposedly, if you change your answer from what your initial first instinct was, then you are more likely to be correct or successful in your answer (Kruger, Wirtz, and Miller, 2005, p. 725). I think that this argument can be argued against if a person takes a longer time to think of their answer first, before putting their initial answer down. However, I guess that if you are thinking for a long enough time, your answer may well have changed from the original, first instinct to a counter answer therefore, proving this argument to be true.

Although, Brownstein and Green (2000, cited in Kruger, Wirtz, and Miller, 2005, p. 725) give a counter argument to Kruger, Wirtz, and Miller. They state that if you change your original answer you are more likely to be wrong.

The potential reason why people prefer sticking with their instinct is due to memory bias. Times when people have changed their answer, they have ended up not doing well or it has turned out unsuccessful and this negativity surrounding changing their answer is more memorable than times when they have changed their answer and the result being successful. For example, if you’re on the motorway, when you change lanes because the other lane seems to be going faster and as soon as you do, the lane you used to be in moves faster, which is even more irritating. It is due to this irritation that we remember the event more therefore, in the future, we decide to stick with our instinct to not change and to just stick in the lane we are in (Kruger, Wirtz, and Miller, 2005, p. 726).

In the first study that (Kruger, Wirtz, and Miller, 2005, p. 726) mention, pupils were informed prior to the test about what would happen. That they were doing a study on changing answers or sticking to the original. I think that this could have influenced pupils as to whether they changed their answers or kept them the same. Maybe these pupils were ones who never changed answers or vice versa and now thought about changing them which could have impacted this study. The result concluded that there were more right to wrong answers by changing answers therefore, disagreeing with the idea that when in doubt, you should change your answer (Kruger, Wirtz, and Miller, 2005, p. 726) but there were various limitations in this study that could have caused this outcome such as, the examiners didn’t see the original answer as it was rubbed out, their rubbed out answers were not their first answer or maybe the eraser mark is from accidently selecting the wrong answer and therefore, it wasn’t their first instinct (Kruger, Wirtz, and Miller, 2005, p. 727).  Although, study three agreed that changing your answer is more beneficial (Kruger, Wirtz, and Miller, 2005, p. 729).

In workshop, we tested this theory. I was in a group of three. One student was going to always choose to always stick with her first answer, I was going to change my answer each time and the other student moved the cups. Our aim was to try and guess which cup the toy car was under. To us, it seemed that this would be a 50/50 chance. However, the result was that the student who stuck with her answer, never got it right and I got it right three out of four times by changing my original answer. The response in our group was, “This is so weird”, “This is so odd” and “unreal”. It seemed that this theory was correct and we were blown away. However, afterwards I thought to myself, there are limitations to our experiment. We were being told to change our answers and maybe if I took more time to consider my first answer (rather than not taking any time at all because I knew I was to change my answer) the result could have been different.

Bauer, Kopp, and Fischer (2007) believe that those who have been told the benefits of changing their answers, when in doubt, had scored higher upon changing their answers than those who were not told about the benefits. However, if this is only for when a person is in doubt, how beneficial is it to change your answer when you are not in doubt but know it’s the other answer or you are in semi-doubt.

Therefore, something to consider for my future development is should teachers inform pupils of the potential benefits of changing their answers from their initial ones. This article seems to say so but, the amount by which the test results increased was not that significant. As long as you only change your answer once, this is the case (Bauer, Kopp, and Fischer, 2007). Although, if teachers tell pupils of these benefits, some pupils may not use their actually intelligence and knowledge to answer correctly in tests but instead, they may choose another answer just because they might score higher.

According to Merritt (2009), you are three times more successful if you change your initial answer. Contrastingly, this article says that you should only change your initial answer if you have logical reason to or you can back it up. You should not change your answer just because you are in doubt or you worry your answer might be wrong which, conflicts with Bauer, Kopp, and Fischer’s (2007) research.

Nevertheless, two other experiments were done to test the theory of whether to change or stay and the results where that in both college exams, sticking with their original answer and changing their answer resulted in more correct answers (Couchman, 2015). This result seems to have come about because the students were instructed to put their confidence level beside each answer. Pupils appear to have chosen carefully if they were choosing to stick or change. They had reason to because of how confident they were on whether they were sure of their answer being correct. Hence, teachers need to be careful what they inform students of such as, telling students to stick with their first answer or to always change it (Couchman, 2015).

In essence, statistics show that you are more likely to have correct answer if you change your answer from the initial one you out down. This links to the basic mathematical concepts that connect to one another such as counting, quantifying links to the basic ideas of chance and probability of getting the answer correct, as this idea looks at which choice is most likely to lead to the correct answer or success.

I would like to further pupils understanding of fundamental mathematics in the future by carrying out this demonstration in the classroom and children could use tally charts to see which method (changing or sticking) is more successful than the other. Furthermore, pupils could look at the different perspectives that this issue can be looked at. For example, do the toy car test that we did in workshop or role play a grocery store. This would involve standing in a busy line for the till, and deciding whether to change to a seemingly faster queue or to stick in the one you’re in (Ma, 2010, p. 104).

So, what should you do? Should you change your answer or keep the initial answer you put down? Well, statistically, you should change your answer if you are unsure of the first answer because you are three times more likely to get the answer right if you do change (Merritt, 2009). Although, you should take time to think about why you might be changing, think of it logically, do not change just out of self-doubt but only if you can back up the reason why you are going to change your answer (Merritt, 2009). After all, it was in the experiment that pupils were not pressured to either change or keep their first answer that they ended up have more correct answers than in the experiments where they were instructed to do one or the other (Couchman, 2015).

List of references:

Win with maths?

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Chance and probability link to the basic ideas or concepts of mathematics (Ma, 2010, p. 104). The basic understanding of probability is that it is the “[L]ikelihood or chance that something will happen.” (Tuner, no date, p.5). The “Probability of an event happening = Number of ways it can happen over the total number of outcomes.” (Probability, 2014). For example, when obtaining a two when rolling one dice, there are 6 outcomes possible. I can only get the two on the dice by landing on the two therefore, the probability is 1 out of 6.  In this blog post, I am going to look at how probability can affect business and I am going to explore the links between gambling, social media likes, addiction and mathematics.

In our workshop, we looked at the different combinations possible when ordering meals (Holme, 2017). The fundamental maths is that there are multiple perspectives (various ways) to figure out the number of choices that could be made (Ma, 2010, p. 104).  McDonald’s became a big business because they had a small variety of options on their menu. These options could all be cooked in a similar way and could be cooked fast. However, at one point, it was said that the McDonald’s menu was getting too big, which caused a decline in business. With more options available, there were complaints that the fast food restaurant, was not fast enough! Therefore, the less choice there is the more customers and sales. (Lutz, 2014). Restaurants could look into the probability of more choice vs the number of customers.

Gambling

Gambling in the UK is now at two billion pounds. However, gambling is addictive and produces a moral and an ethical issue. Addiction to gambling has led some people to steal due to the amount of debt they are in. The number of gambling addicts have doubled in six years and MPs aim to reduce this. It could have a knock-on impact on economy especially if many people are entering debt and Gambling is increasingly prevalent (as it can even be played at home now) (Gallagher, 2013).

Skinner did research on training people with rewards, this being the variable ratio schedule. Skinner suggests that we should not give rewards every time but to give them at random, to change up when we give a reward. He states that to train someone, we should keep rewarding them at the start which gets them hooked, then vary when the reward is given once the behaviour has been established. Casinos have researched this about rewards and in turn have used this information to get people to play and to keep them hooked (Weinschenk, 2013).

Rewards link to social media notifications such as emails or Twitter. We do not continually access these because we have got a notification or because we have a message but because we might have one, it’s the unpredictability. There is a potential reward. This is why we get addicted (Burkeman, 2011). I know I have opened my social media apps, knowing that sometimes a notification doesn’t pop up on my home screen but if I go into the app there is a possibility or a chance that I might get one if I open it. Therefore, this theory about rewards by Skinner can be applied to slot machines because if they rewarded someone every time they played, people wouldn’t get addicted. So, in order to get people addicted or hooked they vary when the rewards are given.

 

Teacher note: Could we use this idea or concept of varied rewards to have more positive behaviour in the classroom? This is something I would like to look into to develop my understanding of fundamental mathematics in the future.

 

Click here to watch a video on addiction to instagram likes. (Yates, 2017)

A reward such as a like on your Instagram causes a release of a chemical called dopamine. This gives us a ‘high’ which encourages our addiction to the likes further. We want more likes and we watch them roll in, creating an addiction because we like that feeling of satisfaction (How the Brain Gets Addicted to Gambling, 2017).

This theory of random rewards causing addiction, connects to the concept of randomness which is explored in the basic mathematical concept of probability and chance. Randomness according to De Finetti (1990, cited in Turner, no date, p. 3) is defined as an individual will not know what a result will be. However, can we determine what the outcome will be using the mathematical concept of probability? Therefore, if the outcome could be more predictable could this mean a reduced likelihood of addiction since it’s the unpredictability of rewards that gets us addicted (Burkeman, 2011).

Gambling relies on randomness and probability (Turner, no date, p. 3). However, it seems that we humans have a different view to randomness since we expect a random outcome to not have the same result in a row, when tossing a coin for example (Holme, 2017).

I thought that a random result wouldn’t have so many tails or heads in a row. When predicting, I tried to mix it up the result, I varied it to make the outcome what I thought to be random. Therefore, supporting the “Naïve Concept of Random Events” as I didn’t think the outcome would be in clumps (Turner, no date, p. 4). Thinking along the lines of, if this result hasn’t occurred much or at all, it’s going to next time. I did not expect a pattern (Turner, no date, p. 5). Even Apple had to make the random shuffle option for selecting songs, less random in order for it to seem more random to humans as the songs ended up being clustered (Bellos, 2010).

Therefore, it’s interesting that Howard (2013, cited in Smart Luck, 2017) contradicts that random outcomes can be in patterns even though the coins toss has just proven that there can be patterns in randomness. One tip that he recommends people use to win the lottery is to follow the human thinking of randomness. Meaning that you should not pick numbers that have a pattern or consecutive numbers. He also suggests that numbers shouldn’t be picked from the same group as its unlikely you’ll win. Although, this would contradict Apples random shuffle option, which often picked songs from the same album (same group) (Bellos, 2010). Furthermore, even though through analysing patterns, he has concluded that, “That which is most possible happens most often. That which is least possible happens least often.” However, the challenge with using probability to help you win in the lottery, is that it isn’t certain that it will occur (Probability, 2014).

This concept of randomness needs to be addressed in school to remove the misconception about randomness. Doing experiments such as the coin toss would be a great example for the class to see as it demonstrates a real-life example of randomness in probability such as the one shown below which we did in a workshop.

Regarding the point I made earlier about addiction being removed or reduced when gambling if the outcome is more predictable, this could be done by utilizing fundamental maths and probability. One example of this is by Darren Brown, who tried to estimate the speed of moving objects, looked at velocity and rate, using mathematics and engineering to guess where the ball might land on the roulette table (Bob, 2009). This being an example of different areas of maths connecting to others to solve a problem (Ma, 2010, p.104). However, even though he used all his knowledge and connected it together, he still was one out from being correct and winning. Similar to probability, it is only a “guide”, it isn’t certain that what is probable will occur (Probability, 2014).

In summary, probability could be used to help restaurants such as fast food places to work out the likelihood of how many customers they will have if they have a certain amount of options on their menu. Additionally, gambling is addictive because people love the satisfaction of the unpredictable rewards, the possibility of getting rewards which is similar to social media likes (Burkeman, 2011). Therefore, gambling machines would need to give rewards at random to keep people hooked which links to the basic concept of probability and chance in maths (Weinschenk, 2013). However, surprisingly there are patterns seen in randomness that humans do not expect. Furthermore, I explored how there is potential to reduce the addiction if the outcomes could be predicted using probability, chance and other areas of maths that could connect (Ma, 2010, p.104). Although, it seems that because probability cannot give an exact answer of the outcomes, its unreliable to use in this case (Probability, 2014).

 

List of references:

Bellos, A. (2010) ‘And now for something completely random, by Alex Bellos’, The Daily Mail, 7 December. Available at: http://www.dailymail.co.uk/home/moslive/article-1334712/Humans-concept-randomness-hard-understand.html (Accessed: 12 October 2017).

Bob (2009) Derren Brown: How to Beat a Casino. Available at: https://learningonscreen.ac.uk/ondemand/index.php/prog/011B9829?bcast=34497126 (Accessed: 12 October 2017).

Burkeman, O. (2011) ‘Can ‘intermittent variable rewards’ help you become addicted to more positive behaviours?’, The Guardian, 23 April. Available at: https://www.theguardian.com/lifeandstyle/2011/apr/23/this-column-change-life-random-rewards (Accessed: 12 October 2017).

Gallagher, P. (2013) ‘Addiction soars as online gambling hits £2bn mark’, Independent, 27 January. Available at: http://www.independent.co.uk/news/uk/home-news/addiction-soars-as-online-gambling-hits-2bn-mark-8468376.html (Accessed: 12 October 2017).

Holme, R. (2017) ‘Chance & probability’ [PowerPoint presentation]. ED21006: Discovering Mathematics (Year 2) (17/18) Available at: https://my.dundee.ac.uk/webapps/blackboard/execute/displayLearningUnit?course_id=_56905_1&content_id=_4941456_1 (Accessed: 12 October 2017).

How the Brain Gets Addicted to Gambling (2017). Available at: https://www.scientificamerican.com/article/how-the-brain-gets-addicted-to-gambling/ (Accessed: 12 October 2017).

Lutz, A. (2014) McDonald’s Menu Is Completely Out Of Control. Available at: http://uk.businessinsider.com/mcdonalds-menu-is-too-large-2014-12?r=US&IR=T (Accessed: 12 October 2017).

Ma, L., (2010) Knowing and teaching elementary mathematics (Anniversary Ed.)New York: Routledge.

Probability (2014) Available at: http://www.mathsisfun.com/data/probability.html (Accessed: 12 October 2017).

Smart Luck (2017) United Kingdom National Lottery Suggestion. Available at: http://www.smartluck.com/free-lottery-tips/england-nationallotto-659.htm (Accessed: 12 October 2017).

Tuner, N. (no date) Probability, Random Events, and the Mathematics of

Gambling. Available at: https://www.problemgambling.ca/EN/Documents/HPG%20Probabilty%20Final.pdf (Accessed: 12 October 2017).

Weinschenk, S. (2013) Use Unpredictable Rewards To Keep Behavior Going. Available at: https://www.psychologytoday.com/blog/brain-wise/201311/use-unpredictable-rewards-keep-behavior-going (Accessed: 12 October 2017).

Yates, E. (2017) What happens to your brain when you get a like on Instagram. Available at: http://uk.businessinsider.com/what-happens-to-your-brain-like-instagram-dopamine-2017-3 (Accessed: 12 October 2017).

 

Can animals count?

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Can animals count? This question I posed to my friend. She responded with, “Yes! No! Wait… maybe?” I had the same reaction to this question. In this blog post I will share my thoughts and findings with you and maybe you too might wonder, can animals actually count?

Horses?

In the 1900’s, there was supposedly a horse that was able to learn basic maths and could count. The owner would ask the horse maths questions that involved adding and dividing. The horse would tap its hoof with the answer. For example, if the answer was two, the horse would tap its hoof twice. However, although it seemed that the horse was counting, I think that it wasn’t, It must have been trained to react that way. As I continued to watch the video about this horse, I came to the discovery that indeed, it was found through experiments, that the horse responded the way it did, due to cues (Bourassa, 2012).

Lions?

There was an experiment carried out to see if lions could count. It seemed that the lions in this experiment were able to count if the number of lions coming (who were intruders) were greater than those in their own group. They were able to do so by listening to the lions roars. Males from the intruders would quantify the amount of females that were in the group before attacking. They could distinguish if there were one or three lionesses by the sound of their roars (BBC News, 2003). Maybe these lions are not aware that they are counting  or actively counting, as they are not thinking, one, two, three like us.  However, maybe they are counting since they could work out the exact amount of lions in prides accurately (BBC News, 2003). If lions can count, why is it that their counting is limited to five or six? (Silver, 2015).

Baby chicks?

An experiment was carried out with baby chicks to see if they could count (these chicks had not been trained). Three balls were hid behind a screen and two behind another. Chicks went to the screen that had the largest amount of balls. Then it was changed up, when some of the balls had been moved, the chicks could “count” that another screen had more balls there. It was believed that they could add and subtract (Gill, 2009).

Chimps?

It is argued that chimps can count as they could understand originality since the chimps could remember the pattern of numbers. In this experiment, I think it was purely a “memory test”, the chimps had learned symbols or, the chimps did so because they wanted their peanuts (Muldertn, 2008).

Dogs?

It seems that dogs cannot discern numbers over one. They know the difference between something and nothing. This may be because they don’t need to “count”. There is no reason to, they do not need to “count” for survival whereas wolves do and they can “count” (Silver, 2015).

Parrot?

Alex, a parrot could allegedly understand colour, shape and could count but, it had been through years of training. Therefore, parrots do not have an innate ability to count like chicks believably have (Silver, 2015). Therefore, maybe animals can count if they are trained.

However, I think that these animals are able to recognise that there are more or less of something. They can recognise if a member of their pack is missing. For the chicks, maybe they just used their memory to know that there were more behind one screen than another and again, they could recognise the difference in quantity, they know what more than one looks like. Animals who have been trained can maybe count. Could we humans count if we were not  taught or trained to? Surely I would be able to recognise the concept of more or less like the chicks? However, isn’t the topic of quantity, one of the basic concepts or principles in maths? (Ma, 2010, pp.24-25).

Although, Gill argues that animals can count, “It is already known that many non-human primates and monkeys can count, and even in domestic dogs…” (Gill, 2009). 

Burns (no date, cited in Tennesen, 2009) accepts a similar idea as I do, stating that animals have an “[I]nnate ability to discern between small numbers”.  In contrast, Burns (no date, cited in Tennesen, 2009) also believes that animals can train themselves to recognise not just small numbers but numbers up to 12!

Interestingly, counting connects to longitudinal coherence, ” Counting is a combination of several skills, each building on the other” (Silver, 2015). Therefore, if animals could count, they would understand the basic elements of the key fundamental principles of mathematics! Additionally, being able to count requires an understanding of ordinality meaning, having an understanding of a series one, two, three. For example, two comes after three and three after two (Oxford Living Dictionaries, 2017).

It seems that animals can count and some are better than others (Silver, 2015). On the other hand, the idea that animals can count is contradicted by Whorf (no date, cited in Bredow, 2006). Whorf’s theory states that if you don’t have any words for numbers, you cannot understand maths and numbers (Silver, 2015).  Therefore, if animals don’t have words for numbers can they really understand numbers, can they count? The Pirahã people are a tribe that did not have words for numbers but, they could understand quantity of more or less and had words for these. When Daniel Everett tried to teach them to count to ten in Portuguese, he found that they could not count and it is not because they are any less intelligent than others. This theory is backed up by an example of The Warlpiri group in Australia who had words, “one-two-many”  for counting and when they were taught numbers past two in English, they were able to (Bredow, 2006).

So, from developing my understanding of fundamental maths and applying it to my research, do I think animals can count? Well, from the evidence above it seems that animals have the ability to recognise a difference in quantity. It is necessary for example, for survival and other animals can count if they are trained. Although, if animals can recognise and understand quantity that demonstrates a basic understanding of a basic principle or idea in mathematics, quantity (Ma, 2010, p. 104).  However, after looking at Whorf’s theory it suggests that animals cannot count because there need to be words for numbers first in order to understand numbers and to be able to count.

Please comment any thoughts you might have on whether animals can count!

References:

  • BBC News (2003) ‘ Counting lions roar for help’, 19 September. Available at: http://news.bbc.co.uk/1/hi/sci/tech/3119456.stm (Accessed: 7 October 2017).
  • Bourassa, P. (2012) Clever Hans. Available at: https://www.youtube.com/watch?v=C0LKN2lFWI4 (Accessed: 7 October 2017).
  • Bredow, R. (2006) Living without Numbers or Time. Available at: http://www.spiegel.de/international/spiegel/brazil-s-piraha-tribe-living-without-numbers-or-time-a-414291.html (Accessed: 7 October 2017).
  • Gill, V. (2009) ‘Baby chicks do basic arithmetic’, BBC News, 1 April. Available at: http://news.bbc.co.uk/1/hi/7975260.stm (Accessed: 7 October 2017).
  • Ma, L., (2010) Knowing and teaching elementary mathematics (Anniversary Ed.)New York: Routledge.
  • Oxford Living Dictionaries (2017) Definition of ordinal number in English. Available at: https://en.oxforddictionaries.com/definition/ordinal_number (Accessed: 7 October 2017).
  • Tennesen, M. (2009) More Animals Seem to Have Some Ability to Count. Available at: https://www.scientificamerican.com/article/how-animals-have-the-ability-to-count/ (Accessed: 7 October 2017).
  • Muldertn (2008) Chimps counting. Available at: https://www.youtube.com/watch?v=0cKg9D4QKCM (Accessed: 7 October 2017).
  • Silver, K. The animals that have evolved the ability to count. Available at: http://www.bbc.co.uk/earth/story/20150826-the-animals-that-can-count (Accessed: 7 October 2017).

Maths in art? Art in maths?

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Previously, I’ve heard people say, “I cannot do art” or “Art is something that I just wasn’t gifted in”. This is why one particular maths workshop came as surprise to me as it demonstrated that you can do art using maths.

In class we created tessellations. Little did I know that this type of art links to basic ideas and concepts in maths such as properties of 2D shapes, angles, triangles, quadrilaterals, symmetry, proportion. It also links to longitudinal coherence since we can use these basic concepts of maths and build upon them to teach area and transformation (Ma, 2010,p. 104).

To create our tessellation, we had to look at the size of the shapes, how the regular shapes of an equilateral triangle, squares and triangles could fit together and why they did. Throughout the workshop we used a whole range of mathematical languages such as edges, sides, angles, pattern and symmetry.

We looked at the tiles in front of us and thought of what pattern we wanted to create. Once we had chosen our pattern, we placed the tiles down on the paper to see if the 2D, regular shapes would fit together. We found that there were going to be gaps however, we solved this challenge as we found that if we rotated some of the triangles, they would fit, leaving no gaps. Once we completed our tessellation, we painted it, using colours to emphasise the pattern created.

This workshop was useful as in the future if there are some pupils who for example say, “I can’t do maths but they say they are good at art, I can show them how both connect to one another, making maths or alternatively art more interesting, fun, engaging and relevant to the pupils as art can be created using mathematical concepts.

 

In the future, this activity would useful for teaching maths and for developing pupils understanding of fundamental mathematics. To start out, pupils could look at shape, angles and explore how shapes fit together. Pupils could be challenged by looking at why these shapes fit together. Pupils could explore this by using a protractor to see how all the angles add up to 360 degrees where the angles meet. Children could be further challenged by making their own shapes. They then could measure the angles to discover how and why they fit together. Additionally, I would like to make shapes relevant to pupils by showing them shapes in real life contexts because pupils might not think of shapes when looking at buildings for example, they could look at photos of the Pantheon in Rome, as the front of it is the shape of a pentagon.

References:

  • Ma, L., (2010) Knowing and teaching elementary mathematics (Anniversary Ed.)New York: Routledge.
  • Valentine, E (2017) Maths, creative? – No way! [PowerPoint Presentation], ED21006: Discovering Mathematics (year 2) (17/18). University of Dundee. 26 September.