Quiz 3 - MC Flashcards
Describe the behavioural study on interocular suppression, demonstrating how subliminal visual stimulus influences our behaviour.
Interocular suppression involves presenting different images to each eye, causing one image to dominate conscious perception while the other is suppressed. Studies show that subliminal stimuli can influence behaviours, such as preferences and choices, even without conscious awareness.
Describe an fMRI study demonstrating neural competition for conscious perception during binocular rivalry.
Binocular rivalry occurs when each eye is presented with a different image, and perception alternates between them. fMRI studies show that during this rivalry, neural competition occurs, with different brain areas activated depending on the perceived image.
Describe “mind wandering” and the brain’s default mode network. Discuss how the default mode network can be studied and how it relates to different mental states and mental health.
Mind wandering refers to the brain’s shift from focused tasks to spontaneous thoughts. The DMN is active during rest and self-referential thoughts. It can be studied using fMRI and is linked to creativity, mental disorders like depression, and cognitive functions.
Compare Freud’s conception of unconsciousness with the modern view.
Freud’s view: The unconscious mind contains desires and memories influencing behavior. Modern view: The unconscious includes automatic processes like biases and procedural memory, playing a role in behavior and decision-making.
Describe how unconsciousness influences our behaviours and decision-making (e.g., priming and subliminal perception).
unconscious influences
priming: exposure to one stimulus influences response to another
subliminal perception: processing information below conscious awareness
Describe the stages of sleep
NREM 1: Light sleep, muscle activity slows. NREM 2: Heart rate slows, temperature drops. NREM 3: Deep sleep, restorative processes occur. REM sleep: Brain activity similar to wakefulness, dreaming occurs, body is paralyzed.
Compare the two different views of why we dream.
Activation-Synthesis Theory: Dreams result from random brain activity. Information-Processing Theory: Dreams help process daily experiences and memories.
Categorize psychoactive drugs and identify their effects on the body.
Depressants (e.g., alcohol): Slow down CNS activity. Stimulants (e.g., cocaine): Increase CNS activity. Opioids (e.g., heroin): Pain relief. Hallucinogens (e.g., LSD): Alter perceptions.
Describe and differentiate different disorders of consciousness (in the context of wakefulness): coma, vegetative state, and minimally consciousness state. Contrast these disorders with locked-in syndrome.
Coma: Unconscious, no wakefulness. Vegetative State: Wakefulness without awareness. Minimally Conscious State: Some awareness. Locked-In Syndrome: Full awareness, paralysis of voluntary muscles except for eye movements.
Describe philosophical thought experiments on the zombie problem and Chinese room problem. Describe the main idea of the Turing test.
Zombie Problem: Imagines beings behaving like humans without consciousness. Chinese Room Problem: Argues that computers can appear to understand language without true comprehension. Turing Test: Assesses if a machine’s behavior is indistinguishable from a human’s.
Describe the four basic properties of consciousness.
Intentionality: Directed towards an object. Unity: Integrates information into a coherent whole. Selectivity: Focuses on certain stimuli. Transience: Tendency to change focus.
Describe the Libet test and what its results suggest about the conscious mind.
The Libet test found that brain activity precedes conscious intention to act by about 200 milliseconds, suggesting unconscious processes initiate actions before conscious awareness.
Compare the three levels of consciousness.
Conscious: Awareness of thoughts and environment. Preconscious: Information not currently in awareness but can be brought to consciousness. Unconscious: Reservoir of feelings, thoughts, and memories outside of conscious awareness.
Identify the types of sleep disorders.
Insomnia: Difficulty falling or staying asleep. Sleep Apnea: Breathing interruptions during sleep. Narcolepsy: Sudden sleep attacks. Sleepwalking: Performing activities while asleep.
Describe the three key processes of memory: Encoding, Storage, and Retrieval.
Encoding: Processing information for storage. Storage: Maintaining information over time. Retrieval: Accessing stored information.
Describe three different ways of encoding and characterize three major stages of memory storage.
Visual Encoding: Encoding images. Acoustic Encoding: Encoding sounds. Semantic Encoding: Encoding meanings. Stages: Sensory memory, short-term memory, long-term memory.
Compare iconic memory and echoic memory; describe one study paradigm that allows for measuring iconic memory properly. Discuss the purpose of sensory memory.
Iconic memory: Visual, lasts ~0.5 seconds. Echoic memory: Auditory, lasts ~3-4 seconds. Sperling’s partial report paradigm measures iconic memory. Sensory memory holds information briefly for initial processing.
Describe the serial position effect. Discuss how chunking and rehearsal contribute to short-term memory (or working memory). Compare short-term memory and working memory.
Serial Position Effect: Better recall of first and last items. Chunking groups information, rehearsal repeats it. Short-term Memory: Temporary storage. Working Memory: Active processing and manipulation of information.
Discuss what the case studies of the patient HM taught us. Contrast anterograde and retrograde amnesia.
HM taught us about memory consolidation. Anterograde amnesia: Inability to form new memories. Retrograde amnesia: Loss of past memories.
Describe the idea of long-term potentiation.
Long-Term Potentiation (LTP) is the strengthening of synapses based on recent patterns of activity, playing a crucial role in learning and memory consolidation.
Explain transfer-appropriate processing. Describe how external context cues (for context-dependent memory) and inner state cues (for state-dependent memory) help retrieval.
Transfer-Appropriate Processing: Memory performance is enhanced when encoding and retrieval processes match. Context-dependent memory: External environment aids retrieval. State-dependent memory: Internal state aids retrieval.
Contrast recall and recognition.
Recall: Retrieving information without cues (e.g., essay test). Recognition: Identifying information from options (e.g., multiple-choice test).