Approaches to Human Cognition

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Flashcards for key words in Chapter One - Cognitive Psychology
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Cognitive psychology aims to understand human cognition by observing the behaviour of people performing a variety of cognitive tasks. brain activity and structure
cognitive neuroscience using information about behaviour and the brain to understand human cognition
Bottom Up processing processing that is directly influenced by environmental stimuli
Serial processing Processing in which one process is completed before the next one starts
Top Down processing Stimulus processing that is influenced by factors such as the individual's past experience and expectations.
parallel processing Processing in which two or more cognitive processes occur at the same time
Ecological Validity The applicability(or otherwise) of the findings of laboratory studies to everyday settings.
Implacable Experimenter The situation in experimental research in which the experimenter's behaviour is uninfluenced by the participant's behaviour.
Paradigm Specificity This occurs when the findings with a given experimental task or paradigm are not obtained even when apparently very similar tasks or paradigms are used.
Modularity The assumption that the cognitive system consists of many fairly independent or separate modules or processors, each specialised for a given type of processing.
Domain specificity The notion that a given module responds selectively to certain types of stimuli (e.g. faces) but not others
Dissociation As applied to brain damaged patients, intact performance on one task but severely impaired performance on a different task.
Double dissociation The finding that some brain damaged individuals have intact performance on one task but poor performance on another task, whereas other individual's exhibit the opposite pattern.
Association The finding that certain symptoms or performance impairments are consistently found together in numerous brain-damaged patients.
Syndrome The notion that symptoms that often co-occur have a common origin.
Case series study A study in which several patients with similar cognitive impairments are tested; this allows consideration of individual data and of variation across individuals.
Sulcus A groove or furrow in the surface of the brain.
Gyri Prominent elevated areas or ridges on the brain's surface ('gyrus' is singular)
Dorsal Superior, or towards the top of the brain
Ventral Inferior, or towards the bottom of the brain
Rostral Anterior, or towards the front of the brain
Posterior Towards the back of the brain
Lateral Situated at the side of the brain
Medial Situated in the middle of the brain
Single unit recording An invasive technique for studying brain function, permitting the study of activity in single neurons.
Event related potentials (ERPs) The pattern of electroencephalograph (EEG) activity obtained by averaging the brain response to the same stimulus (or very similar stimuli) presented repeatedly.
Positron Emission Tomography (PET) A brain scanning technique based on the detection of positrons; it has reasonable spatial resolution but poor temporal resolution.
Functional Magnetic Resonance Imaging (fMRI) A technique based on blood oxygenation using an MRI machine; it provides information about the location and time curse of brain processes.
Event related functional Magnetic Resonance Imaging (efMRI) This is a form of functional Magnetic Resonance Imaging in which patterns of brain activity associated with specific events (e.g. correct vs. incorrect responses on a memory test) are compared
Magnetic Encephalography (MEG) A non-invasive brain scanning technique based on recording the magnetic fields generated by brain activity.
Transcranial magnetic stimulation (TMS) A technique in which magnetic pulses briefly disrupt the functioning of a given brain area. TMS causes interference when the brain area to which it applied is involved in task processing as well as activity produced by the applied stimulation.
Repetitive Transcranial magnetic stimulation (rTMS) The administration of tanscranial magnetic stimulation several time sin rapid succession.
Lesions Structural Alterations within the brain caused by disease or injury.
Electroencephalography (EEG) Recording the brain's electrical potentials through a series of scalp electrodes
BOLD Blood Oxygen Level Dependent Contrast; this is the signal measured by functional magnetic resonance imaging.
Meta Analysis A form of statistical analysis based on combining the findings from numerous studies on a given issue.
Functional Specialisation The assumption that each brain area or region is specialised for a specific function (e.g. colour processing, face processing)
Reverse Inference As applied to functional neuroimaging, it involves arguing backwaards from a pattern of brain activation to the presence of a given cognitive process.
Computational Modelling This involves constructing computer programs that stimulate or mimic human cognitive processes.
Artificial intelligence This involves developing computer programs that produce intelligent outcomes.
Cognitive Architecture A comprehensive framework for understanding human cognition in the form of a computer program.
Connectionist Models Models in computational cognitive science consisting if interconnected networks of simple units; the networks exhibit learning through experience and specific items of knowledge are distributed across numerous units.
Back propagation A learning mechanism in connectionist models based on comparing actual responses to correct ones.
Production Systems These consist of very large numbers of 'if...then' production rules and a working memory containing information.
Production rules 'If....then' or conditional rules in which the action is carried out whenever the appropriate condition is present.
Working Memory A system holding information currently being processed.
Converging operations An approach in which several methods with different strengths and limitations are used to address a given issue.
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