PSYC 111 1st Edition Lecture 4 Outline of Last Lecture I Behaviorism II Cognitive Psychology III Professions in Psychology IV Research Design Outline of Current Lecture II Data Collection Methods III Statistics IV Special Considerations for Psychology Experiments V Genetics Current Lecture I Data Collection Methods One form of a data collection method is the questionnaire The questionnaire is the best way to get information from people Questionnaires can induce representativesampling which is when a large enough and random sample is questioned it will represent the population as a whole An interview is another form of questioning where the questioner gets more information from a subject but it takes more time to get the information Naturalisticinformation is when the observer or experimenter watches and observes the subject and does not disturb in in it habits and actions Tests are the fourth type of data collection method and are done under research settings II Statistics DescriptiveStatistics are the measures of central tendency The mean is the average value of a group of numbers The median is the middle value in a group of values The mode is the number that appears most often in the These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute group of numbers Descriptivestatistics also studies measures of variability The range is the highest number in the group minus the lowest number The variance is the average squared deviation from the mean The standarddeviation is the square root of the variance InferentialStatistics deals with sampling error Inferential statistics is used to determine if differences between groups are due solely to sampling error or sampling error plus independent variable Statisticalsignificance is a t test used to compare 2 means and study the analysis of variance as well as test correlation Reliability and validity are also major parts of statistics Validity is when the test or experiment measures what it was designed to measure Convergentvalidity is when the experimenter measures their test against a measure that already exists Reliability is when the test results of an experiment are consistent III Special Considerations for Psychology Experiments Observer bias is one special consideration for psychology experiments In blind studies the participants of the experiment don t know the hypothesis of the experiment In double blind studies participants and the experimenters don t know the hypothesis of the experiment Lastly the placebo is when the experimenter attempts to avoid a compound so they create a a small lie to trick the participant into taking something that is harmless and has no effect on them but can effect the experiment The other consideration for psychology experiments is ethics Informed consent is 100 necessary and is when the participant must be informed of all of the trials of the experiment beforehand and must agree to participate in the experiment Deception is when the participant is misconstrued in part of the experiment to maintain the validity of the experiment Anonymity is when the participant is kept anonymous to the experimenter so the experiment is in no way biased Lastly the debriefing is when the experimenter and the participant talk about the results of the experiment after it is concluded Chapter 3 Nature Vs Nurture I Genetics The main terminology of genetics includes the nucleus DNA chromosomes autosomes and sex chromosomes both X and Y All of these components make up genes which are the make up of the people we all are Genes can be homozygous or heterozygous and either dominant or recessive Dominant genes are the ones that are portrayed in the human make up For example the brown eyed trait is dominant in most people so it would show up over the blue eyed trait Genotypes are the genetic coding of each human being and the phenotype is what traits are actually shown in the physical appearance Sexual reproduction is how these genes are passed on to new people and is adaptive because it increases variability This process is important for psychology because it shows that some psychological traits are genetically encoded and it was discovered that genes can effect behavior