According to Crick and Mitchison (1983) dreaming is an opportunity of deleting unwanted information in order to make more space. During sleep our brain sifts through these parasitic memories that take up a lot of space in the cortex. By deleting these memories it will create more space in the neuron network so it will function more efficiently. This process is done by the bombardment of impulses to the cortex from the brain stem whilst the modified synapses ensures that the memories will stay unlearned in the future. Dreams also clear out memories of a pathological nature (obsessive or bizarre). Without this deletion of memories our daytime thinking would be disrupted by these bizarre thoughts. This seems to be apparent in people deprived of REM sleep when they show bizarre behaviour. Crick and Mitchinson also suggests that reverse learning provides an adaptive feature. REM allows smaller brains in mammals that sleep and larger neural networks for those that do not to absorb more information.
This is a preview of the whole essay
Peer Reviews
Here's what a star student thought of this essay
Quality of writing
The Quality of Written Communication is fine here. The candidate utilises a number of psychology-exclusive terminology and applies them appropriately and proficiently. The spelling, grammar and punctuation is very adept and accurate throughout. I can only commend the candidate for their clarity of written expression here as there answer is very clear and precise read due to this written accuracy.
Level of analysis
The Level of Analysis here isn't very evident. Though the questions asks for "Outline" and "Evaluate", candidates cannot expect to achieve a high grade for concerning only one of the question targets. It is likely that the "Outline" section will be worth 6-8 marks and the "Evaluate" being worth 10-12 marks, so to neglect the large portion of the question marks is not a wise idea. The candidate should therefore aim to, after the "Outline" section, construct an argument consisting of two strengths and two weaknesses for each. Each of these strengths and weaknesses must be contextualised, and to achieve the highest grades candidates must be looking to integrate other arguments and debates in Psychology into the evaluation, e.g. - An outline of Dement & Kleitman's study into the stages of sleep and dreaming could be evaluated as having high control and objectivity due to the collection of quantitative data, and this could be linked to the Scientific debate in Psychology. The weaknesses include the lack of ecological validity (due to high control) and the potential reductionism of the quantitative data collected. Without this analysis, this candidate is limited to a potential score of (if the question is out of 18) 6 (for "Outline") + 2 (for "Evaluate"), or a total of 8/18.
Response to question
This candidate's knowledge is very good, but they have not formed an answer that suitably answers the question. The response is therefore limited in marks as it does not satisfy the demands of the question. The question asks for an "Outline" of two theories; the candidate appears to get off to a good start with an excellent outline of Crick & Mitchinson's theory of the biology of dreaming, but instead of critically evaluating the theory and then beginning on the compulsory second, the candidate simply outlines - in arguably less detail - a lot of other theories of the biology of dreaming, with only a few speckles of evaluation interspersed throughout, none of which is to an acceptable depth or discussion because the candidate does not provide a balanced argument that effectively evaluates two of the theories. The candidate's knowledge is fine, but they have not answered the question here; I stress the importance of paying attention to the question and making sure all answers pertain explicitly to the question.