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The Evolution of Psychology - Introductory Psychology - Notes |, Study notes of Psychology

chapter 1-3 (Prof. Rifkin) Material Type: Notes; Class: Introductory Psychology; University: Kennesaw State University; Term: Spring 2011;

Typology: Study notes

2010/2011

Uploaded on 03/25/2011

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Chapter 1: The Evolution of Psychology
Why Study Psychology?
Psychology is practical
Psychology is a powerful way of thinking
Psychology teaches a healthy respect for the complexity of behavior
Misconceptions About Psychology
From Speculation to Science:
How Psychology Developed
Prior to 1879
Physiologists and philosophers studying questions about the mind
Wilhelm Wundt (1832-1920) University of Leipzig, Germany
Campaigned to make psychology an independent discipline
Established the first laboratory for the study of psychology in 1879
Psychology was born
The Battle of the “Schools” Begins: Structuralism vs. Functionalism
Structuralism – Edward Titchener
Analyze consciousness into basic elements
Introspection – Careful, systematic observations of one’s own conscious experience
Functionalism – William James
Investigate function of consciousness
Led to investigation of mental testing, developmental patterns, educational practices and sex
differences
Sigmund Freud and the Concept of the Unconscious Mind
Sigmund Freud (1856-1939): Austria
Founded Psychoanalytic school of thought
Emphasis on unconscious processes influencing behavior
The checks and balances of the Id, Ego & Superego
Freud’s Ideas:
Controversy and Influence
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Chapter 1: The Evolution of Psychology

  • Why Study Psychology?
  • Psychology is practical
  • Psychology is a powerful way of thinking
  • Psychology teaches a healthy respect for the complexity of behavior
  • Misconceptions About Psychology From Speculation to Science: How Psychology Developed
  • Prior to 1879
    • Physiologists and philosophers studying questions about the mind
  • Wilhelm Wundt (1832-1920) University of Leipzig, Germany
    • Campaigned to make psychology an independent discipline
    • Established the first laboratory for the study of psychology in 1879 Psychology was born
  • The Battle of the “Schools” Begins: Structuralism vs. Functionalism Structuralism – Edward Titchener
    • Analyze consciousness into basic elements
    • Introspection – Careful, systematic observations of one’s own conscious experience Functionalism – William James
    • Investigate function of consciousness
    • Led to investigation of mental testing, developmental patterns, educational practices and sex differences Sigmund Freud and the Concept of the Unconscious Mind
  • Sigmund Freud (1856-1939): Austria
  • Founded Psychoanalytic school of thought
  • Emphasis on unconscious processes influencing behavior
    • The checks and balances of the Id, Ego & Superego
  • Freud’s Ideas: Controversy and Influence
  • Behavior is influenced by the unconscious
  • Unconscious conflict related to sexuality plays a central role in behavior
  • Controversial notions caused debate/resistance
  • Significant influence on the field of psychology Behaviorism: Redefining Psychology
  • John B. Watson (1878-1958): United States
    • Founder of Behaviorism
  • Psychology = scientific study of behavior
  • Behavior = overt or observable responses or activities
    • Radical reorientation of psychology as a science of observable behavior
    • Study of consciousness abandoned John Watson and the Nature-Nurture Debate
  • Nurture, not nature
    • give me a dozen healthy infants, well-formed, and my own special world to bring them up in and I’ll guarantee to take any one at random and train him to become any type of specialist I might select – doctor, lawyer, artist, merchant-chief, and yes, even beggar-man and thief …”
  • Behaviorist school of thought emphasized the environment (nurture) Are people free? B.F. Skinner
  • B.F. Skinner (1904-1990): United States
    • Environmental factors determine behavior
    • Responses that lead to positive outcomes are repeated
    • Responses that lead to negative outcomes are not repeated
    • Beyond Freedom and Dignity
    • More controversy regarding free will The 1950’s: Opposition to Psychoanalytic Theory and Behaviorism
  • Charges that both were de-humanizing
  • Diverse opposition groups got together to form a loose alliance
  • A new school of thought emerged - Humanism
    • Led by Abraham Maslow (1908-1970) and Carl Rogers (1902-1987)

Focus of Research – nine areas Developmental Social Educational Health Physiological Experimental Cognitive Psychometrics Personality Psychology Comes of Age as a Profession

  • Applied psychology
  • Clinical psychology
  • World War II
  • Clinical psychology receives institutional support Psychology Today: A Thriving Science and Profession Applied Psychology : Six major areas _- Clinical psychology
  • Counseling psychology
  • Industrial and organizational psychology
  • School & Educational psychology
  • Clinical Neuropsychology
  • Forensic psychology_ Studying Psychology: Seven Unifying Themes Psychology as a field of study:
    • Empirical
  • Theoretically diverse
  • Evolves in sociohistorical context Behavior:
  • Determined by multiple causes
  • Shaped by cultural heritage
  • Influenced jointly by heredity and environment
  • People’s experience of the world is highly subjective.
  • PERSONAL APPLICATIONS of PSYCHOLOGICAL PRINCIPLES (1)
  • Improving Academic Performance
  • Developing Sound Study Habits
  • Set up a study schedule – leave time for breaks
  • Establish a study center – quiet, minimal distractions to interfere with concentration
  • Reward your studying efforts
  • PERSONAL APPLICATIONS of PSYCHOLOGICAL PRINCIPLES (2) Improving Academic Performance
  • Improving Your Reading
  • SQ3R
  • Survey
  • Question
  • Read
  • Recite
  • Review PERSONAL APPLICATIONS of PSYCHOLOGICAL PRINCIPLES (3)
  • Improving Academic Performance
  • Lectures
  • Attend class – poor attendance correlates with poor grades
  • Listen actively
  • Take notes – emphasize important points

Chapter 2: The Research Enterprise in Psychology Looking for Laws: The Scientific Approach to Behavior

  • Basic assumption: events are governed by some lawful order
  • Goals:
    • Measurement and description
    • Understanding and prediction
      • Development of theories
      • Testing hypotheses
    • Application and control ADVANTAGES of the SCIENTIFIC APPROACH
  • Clarity and precision of communication
    • Observations and facts > hypotheses > Theories
  • Low tolerance for error
    • Scientists are trained to be skeptical
    • Ideas are empirically tested > objective data & thorough documentation
    • Findings are open to inspection by others Looking for Causes: Experimental Research
  • Experiment = manipulation of one variable under controlled conditions so that resulting changes in another variable can be observed - Detection of cause-and-effect relationships
  • Independent variable = variable manipulated
  • Dependent variable = variable affected by manipulation
    • How does X affect Y?
    • X = Independent Variable, and Y = Dependent Variable Experimental and Control Groups: The Logic of the Scientific Method
  • Experimental group
  • Control group
    • Random assignment
  • Manipulate independent variable for one group only
  • Resulting differences in the two groups must be due to the independent variable Extraneous and confounding variables
  • Experimental Designs: Variations
  • Expose a single group to two different conditions
  • Reduces extraneous variables
  • Manipulate more than one independent variable
  • Allows for study of interactions between variables
  • Use more than one dependent variable
  • Obtains a more complete picture of effect of the independent variable
  • Strengths and Weaknesses of Experimental Research
  • Strengths:
  • conclusions about cause-and-effect can be drawn
  • Weaknesses:
  • artificial nature of experiments
  • ethical and practical issues
  • The Concept of Correlation
  • Direction of relationship
  • Strength of relationship
  • Correlation coefficient
  • Correlation and prediction
  • Correlation and causation
  • Descriptive Methods Methods used when a researcher cannot manipulate the variables under study
  • Naturalistic observation
  • Case studies
  • Surveys

Chapter 3: The Biological Bases of Behavior Communication in the Nervous System

  • Glia – structural support and insulation
  • Neurons – communication
    • Soma – cell body
    • Dendrites – receive
    • Axon – transmit away
    • Myelin sheath – speeds up transmission
    • Terminal Button – end of axon; secretes neurotransmitters
    • Neurotransmitters – chemical messengers The Neuron at Rest
  • Hodgkin & Huxley (1952) - giant squid
    • Fluids inside and outside neuron
    • Electrically charged particles (ions)
    • Neuron at rest – negative charge on inside compared to outside
    • -70 millivolts – resting potential The Action Potential
  • Stimulation causes cell membrane to open briefly
  • Positively charged sodium ions flow in
  • Shift in electrical charge travels along neuron The Action Potential
  • All–or–None Law
  • The Synapse
  • Synaptic cleft
  • Presynaptic neuron
    • Synaptic vesicles
    • Neurotransmitters
  • Postsynaptic neuron
  • Receptor sites
  • When a Neurotransmitter Binds: The Postsynaptic Potential
  • Voltage change at receptor site – postsynaptic potential (PSP)
  • Not all-or-none
  • Changes the probability of the postsynaptic neuron firing
  • Positive voltage shift – excitatory PSP
  • Negative voltage shift – inhibitory PSP Integrating Signals
  • One neuron, signals from thousands of other neurons Neural networks
  • Patterns of neural activity
  • Interconnected neurons that fire together or sequentially Synaptic connections
  • Elimination and creation
  • Synaptic pruning Neurotransmitters and Behavior
  • Specific neurotransmitters work at specific synapses
  • Lock and key mechanism
  • Agonist – mimics neurotransmitter action
  • Antagonist – opposes action of a neurotransmitter
  • More than 40 neurotransmitters known at present
  • Interactions between neurotransmitter circuits THE NEUROPHYSIOLOGY OF ABUSE
  • Alcohol
  • Amphetamines
  • Caffeine
  • Methamphetamine – “crystal meth”
  • Cocaine & Heroin

OR

Does our brain chemistry reflect an encounter with the divine? Organization of the Nervous System

  • Central nervous system (CNS)
    • Afferent = toward the CNS
    • Efferent = away from the CNS
  • Peripheral nervous system
    • Somatic nervous system
    • Autonomic nervous system (ANS)
      • Sympathetic
      • Parasympathetic Studying the Brain: Research Methods
  • Damage studies/lesioning
  • Electrical stimulation of the Brain (ESB)
  • Brain imaging –
    • computerized tomography
    • positron emission tomography
    • magnetic resonance imaging
  • Transcranial magnetic stimulation (TMS) Brain Regions and Functions
  • Hindbrain – vital functions – medulla, pons, and cerebellum
  • Midbrain – sensory ( vision & hearing) functions; voluntary movement (dopamine system), reticular activating system
  • Forebrain – emotion, complex thought – thalamus, hypothalamus, limbic system, cerebrum, cerebral cortex The Cerebrum: The Seat of Complex Thought Four Lobes :
    • Occipital – vision
    • Parietal - somatosensory
  • Temporal - auditory
  • Frontal – movement, executive control systems Right Brain/Left Brain: Cerebral Specialization
  • Cerebral Hemispheres – two specialized halves connected by the corpus callosum
  • Left hemisphere – verbal processing: language, speech, reading, writing
  • Right hemisphere – nonverbal processing: spatial, musical, visual recognition The Pseudoscience of Phrenology
  • Franz Joseph Gall – 1809
  • Cesare Lombroso – revived interest in the early 20th^ Century consequent to studies in evolution, criminology and anthropology
  • Phrenology continued to have influence as it was used to support racist ideologies – Nazism’s belief in Aryan superiority The Endocrine System: Another Way to Communicate
  • Hormones – chemical messengers in the bloodstream
  • Endocrine glands
  • Pituitary – “master gland,” growth hormone
  • Thyroid – metabolic rate
  • Adrenal – salt and carbohydrate metabolism
  • Pancreas – sugar metabolism
  • Gonads – sex hormones Basic Principles of Genetics
  • Chromosomes – strands of DNA carrying genetic information
  • Human cells contain 46 chromosomes in pairs (sex-cells – 23 single)
  • Each chromosome – thousands of genes, also in pairs Polygenic traits
  • Research Methods in Behavioral Genetics
  • Family studies – does it run in the family?
  • Twin studies – compare resemblance of identical (monozygotic) and fraternal (dizygotic) twins on a trait