June 20, 2013

(4/4) Contrasting Computational and Ecological Strategy in a Virtual Interception Task.

Thesis experiment. Flying Spaghetti Monster I love research!

I have already alluded to the main finding of the study in this post. So I will solely give you the link to my thesis experiment document here (13 pages). For any correspondence feel free to either comment here or e-mail me at sf985 at live dot com.

Reference list for entire thesis found here.

Plus, lastly, the entire Master Thesis as .pdf can be downloaded from here. It has been publicised also through Lund University's LUP service and should be publicly available from their database as soon as it is accepted. I'll try and update this post with a direct link later.

Happy Midsummer Eve! Dancing around the Midsummer Pole pretending to be a frog obligatory!

[Edit 1/7: Thesis is now published and live at Lund University Publications]

(3/4) Cognitive Psychology in Crisis: Ameliorating the Shortcomings of Representationalism. EcoPsy and rECS.

After a few more e-mails to a few people, I received my feedback. It was mostly general structuring issues and broader aspects of the thesis. Valuable and informative comments overall, so no change in posting the last two chapters as planned.

This chapter is to me a bit of an anti-climax. It mainly contains definitions and concepts, explanations and examples. So, if you already know your way around Gibson’s Ecological Psychology, Chemero’s radical Embodied Cognitive Science, van Gelder’s Watt Governor example for Dynamic Systems Theory and Wilson and Golonka’s four-point task analysis, there is not too much to gain from this chapter. You can find the whole 21 page chapter here. One thing of importance however, is that in this chapter I attempt to ontologically and epistemologically define affordances, something I have not seen in the literature before. However, I have already posted my ontological query here. The last section in this chapter does bring up a novel area of interest to EcoPsy however. It is called “Electronic Sports and Computer Resistance” and brings in the curious aspect of affordance/information from depictions. I have written about this in a previous blog post also, but have extended and reworked it a bit. So the following is a summary of that section;

Gibson, Chemero and Wilson discuss if affordances actually exist when perceiving depictions. This is quite curious because it is not intuitively simple to decide whether depictions actually afford something, or inform of something. Wilson is currently intellectualising about this, so we will have to wait to see what comes out of that. The official understanding (most likely to change) is that depictions do not afford us anything. This in turn impacts computer-screen research if you wish to stick to EcoPsy because the broad genres of computer gaming and on-screen research rely on it. If we immerse ourselves in virtual environments, are we dealing with affordances? Virtual affordances? Not affordances at all? Information? Virtual information? Do virtual environments inform us and not afford us? Does a virtual environment offer virtual affordances to virtual agents? This could easily be a point of criticism against EcoPsy in a philosophy-journal, but there’s no fun in that, is there? Instead I attempt to define virtual affordances and virtual environments as separate concepts, at least until their possible integration depending on the work of Wilson. The simplest core concept here is the verbal notation virtual which should be seen as a working definition.

I am going to try and summarize and post the last chapter, my thesis experiment, as soon as possible. If not today, then probably during the weekend seeing as Midsummer’s Eve is upon Sweden tomorrow! So, Happy Midsummer's Eve and don't forget to dance around the Midsummer Pole pretending you are a frog.

June 16, 2013

(2/4) Cognitive Psychology in Crisis: Ameliorating the Shortcomings of Representationalism. Representationalism.

I have yet to hear back from my examinators, so the following has not been officially critiqued. I did want to receive this before I posted it here, but alas, here we are.

This chapter is devoted to critiquing the principles of representations and clarifies and exemplifies that the map you follow when embracing representationalism is misguiding. It is 14 pages long, and you can find it here.

Historically, Titchener (1895) proposed stimuli to cause linear series of mental acts, at the end of which is a behavioural response. Which mental acts occur, and in which order, are for the experimenter a matter of speculation. It was critiqued by Dewey (1896) already the year after as being subject to the "empiricist fallacy". This term is used in a broader sense in the thesis concerning unobservable events.

Chemero (2007) argues that Hegelian Arguments (arguments marshalled in an attempt to constrain empirical research and close down developing research programs a priori) shut down alternative interpretations, even ones that hold promise to give satisfying explanations. In my own view, cognition is often treated as the pinnacle of evolution and it enforces an arbitrary argument but powerful consequence. It heightens the credit towards the subject matter of psychology, a discipline often under fire from competing disciplines for being non-scientific. It is a left-over from the establishment of psychology as its own discipline, Unfortunately, many still live within the perspective that brain and mind are separate or “just different perspectives of the same thing”. Nonsense. Science necessarily relies on materialistic monism, no room for dualism.

The issue presents itself when we are unaware that this is excluding other alternatives and theorists act through a theoretical filter, biasing assumptions and interepretations in experimentation. If we assume that everything is represented in the brain then we will only look in the brain and interpret results on this basis also. An example of this is the curious case of mirror neurons. Barrett (2011) proposes that mirror neurons are difficult entities to account for without representations. Their function has been severely de-dramatised as of late, but observations made state that they fire both on others’ specific movement as well as one’s own. This finding is not contrary to Ecological Psychology, for example, but because of ignorant theory-ladenness, explanations given and research on, link them with representations. Instead, ignoring what contemporary cognitive theory forces us to believe, what could explain their function? It may just be simultaneous activation between stimulated sensory modalities and/or movement, and due to strengthening of simultaneous neuronal activation, they are just more so activated, or activated in different ways, than other neurons due to their multiple sources. Explanations like these are however more than discouraged due to Hegelian arguments and theory-laden contemporary cognitive psychology.

Because of the unfounded assumption that language is an abstract symbolic system following laws of grammar, we came to the false conclusion that it would be easy to construct what was supposedly so easily accomplished in our brain. Under a representationalist understanding of human enterprise, it really should have been simple, and justified, to put resources to projects like CYC and DARPA. When failed, it should have given some indication on that perhaps underlying theory is not correct in its assumptions.

A person is led into a room, seated and asked to read a list of words. After some time, the same person is asked to write down as many of the words as possible. The conclusion to this type of experiment is that the invisible process underlying the explanation of recall is called memory, and consists of representing the words in the brain, storing them, to later pull them out and write them down. Popper (1963) had the idea of theories to be non-scientific if any result could be explained in terms proposed by the theory. Posit that a participant in the above experiment does not write down any, or very few, words. Is the theory to blame and a rejection of representationalism in order? No, and in all honesty, it would not be justified to do so because the participant’s result does not directly falsify the claim. The first issue with this is that empirical observation cannot falsify the claim, and secondly, it cannot falsify it because the claim does not strictly deal with what is observed, but rather, what is not. It would be claimed that the participant failed, but not only, it would also be claimed that the participant failed to live up to the already assumed unobservable process posited to exist.How can a methodology be accepted that, without anything else to refute alternative explanations on than Hegelian arguments, posits an unobservable process to exist and then compare any observable behaviour to live up to its presumptuous ideals? Instead, the question needs to be, what is it that actually is observed? There are two behaviours, reading the list and writing down words previously on that list. Everything else is an assumption.

To exemplify that logic is without perspective and not a reasonable norm, the classic four card task (Wason, 1966) residing on truth-table logic will be used. Trivers’s model was introduced to this task, yielding the if-then statement “If a previous employee gets a pension from the firm, then that person must have worked for the firm for at least 10 years.”. The four cards read, “got a pension”, “worked for 10 years”, “no pension” and “worked for 8 years”. Perspective, as mentioned earlier, is crucial. When participants were told they were an employee, they turned up “worked for 10 years” and “no pension”. When told they were an employer, they turned up “got a pension” and “worked for 8 years”. The latter situation renders choices of participants consistent with both Trivers’s model of cheater detection and the laws of the truth table. The former situation however, is not consistent with truth-table logic, but is explained by Trivers’s social contract theory. Gigerenzer (2008) argues that this is essentially a frame-of-reference problem and it is unfair to set up (albeit, perhaps, unintentionally) an experiment in this way in order to confirm a hypothesis. In contrast, it is important to note that logic can be appropriate as a criteria, but its domain is restricted (Gigerenzer, 2008). Truth-table logic experiments have not explained human enterprise, but rather, explored the limits of logic as criteria.

Challenging traditional cognitive psychology is an uphill battle against tradition, norm, life works, unfair criteria, Hegelian arguments, the Empiricist Fallacy, theory-ladenness and non-falsifiability. However, on a theoretical basis it has, thus far, little to stand on.

It is not with neuropsychologists I lay blame, they often know of all the issues inherent in methodology and apparatus, it is with those who draw unfounded conclusions from this field. First of all, it is not a natural environment for humans to lie frozen in an enclosed area fixating on a screen, but more so to a general point; can we ultimately say that performing no task is a valid baseline to compare with performing a task? The assumption is that it is, but again, it only comes about because of the restrictions on methodology because of the practical restraints in testing participants. What other baseline is possible? A second issue is that the difference in activation between the two conditions, depending on particular method, shows a maximum of 5% difference in activation. The remaining 95% of the activation is at the same levels under both conditions (Pfeifer and Bongard, 2007). What are those 95%? Contemporary cognitivists tend to ignore them and usually only point to the difference (for example Ochsner & Gross, 2008, or see Logotheitis, 2008, for a discussion on fMRI-techniques), which is clearly all too simplistic. A third issue is brought to our attention through Naghavi and Nyberg (2005), whom caution against too much enthusiasm by stating that “functional neuroimaging techniques can at best specify the coincidence of regional brain activations with specific cognitive demands. These methods cannot determine which brain regions are essential for a specific cognitive process.” (Pfeifer and Bongard, 2007, p. 321). It is important that we do not let unwarranted assumptions and generalisations taint the neuropsychological field, turning it into a modern version of phrenology where different brain parts do different things in isolation. A fourth important aspect is the assumption that the images show “thoughts” or other vague definitions of cognition. What we in fact see, taking fMRI as an example, is firstly an inference between ‘more thoughts’ and ‘more activation’, secondly an inference from ‘amount of activation’ to ‘amount of blood flow’, and thirdly, an inference from blood flow to an averaged out numeric value between spatial areas, participants and timeframes. There are thus three steps of inferential logic which makes it vulnerable to both a priori and ad hoc assumptions of what it is we are actually looking at when we are presented with these images. There is thus little support gained, at the present moment in time, from the maturing field of neuropsychology. We simply do not yet have enough knowledge, specific or enough controlled techniques to confidently state what the brain is doing. What are we actually looking at?

Although representations are unobservable entities with only assumptions to rely on, yet are essential for contemporary cognitive psychology, and thus needs to physically exist, the only thing left to deal with in representationalism, is that of Entity Realism. This is the proposition that you can still be justified in assuming a realist standpoint for theoretical entities (and representations fits this bill), if one has pragmatic use for them as tools in experimental investigation of other entities (Chemero, 2007). As in the case of asking participants to recall a list of words, the explanation given for their current behaviour is by reference to a previous behaviour, but, what went on in participants have not actually been observed, the word ‘memory’ is just used to fill this gap (Barrett, 2011). In other words, the issue with this proposition is that, because representations are necessary for the internalist account, yet have not been established empirically to actually exist, the assumption does not really explain anything. It is merely stating that, this is one possible process that may occur because it would fit the criteria for linking one behaviour to another. There is doubt that cognitive scientists would resort to this however, since the power of the concept is drastically reduced, and in all right.

All we have done is named unobservable, hypothetical processes, leading us down a garden path, away from the core subject of psychology. We want to understand why humans behave the way they do, we want to understand what the brain does. Representationalism does not provide these answers. “...if we cannot do any better than this, we should stop using the word...” (Gibson, 1986, p. 254).

June 13, 2013

(1/4) Cognitive Psychology in Crisis: Ameliorating the Shortcomings of Representationalism. Introduction and Abstract.

This is the shortened abstract/introduction to my thesis, the full version of the abstract and introduction (2 pages) are available here.

Essentially, traditional cognitive psychology relies on concepts bordering idealism. This issue was highlighted over a century ago, but Hegelian arguments, Theory-ladenness and ostensible predictive value have deterred competing paradigms. Ecological Psychology and radical Embodied Cognitive Science gets rid of the non-sequiter that “it is all in the brain”. Organisms are born into an ever-changing environment, which we constantly interact with, perceive ourselves in, constantly changes and are changed by. The first two chapters concern refuting the existence of representations, explaining the consequences that the paradigm has brought with it, introducing Ecological Psychology and radical Embodied Cognitive Science, lay out one step on the way to a clearer ontological and epistemological basis, and lastly, attempt to contrast computational/representational assumptions about the brain with ecological assumptions in a virtual interception task. Hypothesis is that participants will favour an ecological strategy over a computational. Results speak in favour of the hypothesis, however mainly an ecological validity issue necessitates further empirical investigation.

            Keywords: representationalism, ecological psychology, screen-presented research

('Arguments against Representationalism' to follow this blog post within the next couple of days.)

June 8, 2013

Contrasting Ecological and Computational Strategy in a Virtual Interception Task 1/5

Well, it looks like my master thesis will be admitted and graded. They brought in an extra examiner on my thesis since its philosophically heavy, so it'll take a few more days to get it graded. When it is, I am going to correct some errors and format it properly (as luck had it, I was following a previous APA-style guideline, it was not appreciated). And I figured, I'll post the whole thing here in three chunks. The arguments against representationalism, the basic definitions of ecological psychology and radical embodied cognitive science, and lastly, my research paper.

As I have been invited to speak at the Social Sciences Master Graduation Ceremony, I have that to focus on, as well as, wait for critique from my second examiner. Roughly, I'll be able to post my stuff a few days after the 11th.


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