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PSYC3102 Lecture 3 with correct answers

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Genomic Imprinting The expression (active vs inactive) of a gene depends on which parent transmits the gene. Epigenesis Anything genetic above and beyond the sequence of nucleotides. Dimmer Switch Lyonization At fertilization, both X chromosomes are active. Very soon, however, one of the X chromosomes in a cell, apparently taken at random, is inactivated and forms a Barr body. All other cells derived from the initial cell have the SAME X chromosome inactivated. Sequence Transmission (Blueprint transmission) Transmission of information via the order of the nucleotides (A, C, G, T) Epigenetic Transmission (Regulatory transmission) Transmission of information about gene regulation Transmission of genetics "above and beyond" the sequence of nucleotides Transcriptional Regulation 1.DNA Methylation 2.Histone Modification 3.Transcription Factors DNA Methylation Methyl group (CH3) added to DNA Effect of this is to turn down the dimmer switch, all the way to turning the gene off (reduces gene expression). Histone Modification Chemical modification of histone proteins in the nucleosome. -Influences "density" of DNA packaging in chromosomes. -Influences transcription -Ex. cocaine & amphetamines Transcription Factor (regulatory protein) Protein or protein complex that enhances or inhibits transcription. -Ex. CREB: Transcription factor in neurons -Bind/closer together Enhancer Section of DNA that is far away from a gene but still influences transcription. Regulates Reduction divison The stage of cell division in gametes in which the amount of DNA is reduced by half Mitosis Ordinary cell division Meiosis Gamete cell division The amount of DNA in the resulting cells is halved. Neurotransmitters The majority of neuron to neuron transmission takes place through these. Enzymatic degradation This mechanism is

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Psyc 3102
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Psyc 3102

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PSYC 3102 Exam 1 Chapter 1,3
questions with answers Graded A+
What are the 3 elements of psychology? - answers-behavior
-environment
-organism

Cognition involves... - answersPerception
Attention
Remembering
Distinguishing items in a category
Visualizing
Language
Problem-solving
Reasoning and decision-making

Cognitive Psychology - answersthe branch of psychology concerned with the scientific
study of the mind

Cognition refers to what? - answersthe mental processes, such as perception, attention,
attention, and memory, that are what the mind does

Reaction-time (RT) experiment - answersMeasures interval between stimulus
presentation and person's response to stimulus

Simple RT Task (Donders) - answersparticipant pushes a button quickly after a light
appears

Choice RT task (Donders) - answersparticipant pushes one button if light is on right
side, another if light is on left side

Ebbinghaus (1885/1913) - answersthe savings method to measure forgetting

Donders (1868) - answerssimple reaction time versus choice reaction time

In Ebbinghaus experiment, most savings equals... - answerstime interval is short

In Ebbinghaus experiment, less savings equals... - answerstime interval is longer

What problems did John Watson see what the first cognitive psychologists ideas? -
answers-extremely variable results from person to person
-results difficult to verify (invisible inner mental processes)

, John Watson proposed a new approach called what? - answersbehaviorism

Watson and Rayner (1920) are known for what experiment? - answers"Little Albert"
experiment

classical conditioning - answerspairing one stimulus with another previously neutral
stimulus causes changes in the response to the neutral stimulus

B.F. Skinner developed - answersoperant conditioning

operant conditioning - answers-shape behaviors by rewards or punishments
-behavior that is rewarded is more likely to be repeated, whereas behavior that is
punished is less likely to be reapeated

Tolman created... - answerscognitive map (rat maze)

Skinner argued that... - answerschildren imitate speech they hear and correct speech is
rewarded

Chomsky argued that... - answerschildren do not only learn language through imitation
and reinforcement; language must be determined by inborn biological program

How can you understand complex cognitive behaviors? - answers-measure observable
behavior
-make inferences about underlying cognitive activity
-consider what this behavior says about how the mind works

information processing theory - answersa way to study the mind created from insights
associated with the digital computer

Cherry (1953) - answers"Dichotic" listening
-Present message A in left ear
-Present message B in right ear
-To ensure attention, shadow one message
-Participants were able to focus only on the message they were shadowing

Broadbent (1958) - answers-Flow diagram representing what happens as a person
directs attention to one stimulus
-Unattended information does not pass through the filter

How research progresses from question to question - answers-Start with what is known
-Ask questions
-Design experiments
-Obtain and interpret results
-Use results as the bases for new research questions and experiments

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