Search for tag: "random"

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5.5 Probability sampling - complex types \|… duration 5 minutes 45 seconds 5.5 Probability sampling - complex types \|… 5.5 Probability sampling - complex types \| Quantitative methods \| Sampling \| UvA	5.5 Probability sampling - complex types \| Quantitative methods \| Sampling \| UvA This video discusses more sophisticated types of probability sampling: stratified random sampling and multi-stage cluster sampling. You learn about weighing in stratified sampling and the… stratified random sampling multi-stage cluster sampling external validity random sampling random sample gestratificeerde steekproef clustersteekproef meertrapssteekproef aselecte steekproef toevalssteekproef probabilistische steekproef externe validiteit From Sander Birkhoff 0 likes 1 plays 0 Language English - en Department FMG
5.4 Probability sampling - simple random and… duration 4 minutes 3 seconds 5.4 Probability sampling - simple random and… 5.4 Probability sampling - simple random and systematic \| Quantitative methods \| Sampling \| UvA	5.4 Probability sampling - simple random and systematic \| Quantitative methods \| Sampling \| UvA This video discusses the two simplest types of probability sampling: simple random sampling and systematic sampling. You also learn about the possibility of bias in systematic sampling. external validity random sampling random sample simple random sampling systematic sampling gewone enkelvoudige aselecte steekproef systematische enkelvoudige aselecte steekproef aselecte steekproef toevalssteekproef probabilistische steekproef externe validiteit From Sander Birkhoff 0 likes 1 plays 0 Language English - en Department FMG
5.3 Probability sampling \| Quantitative methods \|… duration 4 minutes 34 seconds 5.3 Probability sampling \| Quantitative methods \|… 5.3 Probability sampling \| Quantitative methods \| Sampling \| UvA	5.3 Probability sampling \| Quantitative methods \| Sampling \| UvA This video explains the essential features of probability sampling is. You learn why probability (or random) sampling minimizes the selection threat to external validity. In the next videos different… external validity selection threat random sampling random sample aselecte steekproef toevalssteekproef probabilistische steekproef willekeurige steekproef willekeurige steekproeftrekking externe validiteit From Sander Birkhoff 0 likes 1 plays 0 Language English - en Department FMG
4.6 Measurement reliability \| Quantitative… duration 5 minutes 47 seconds 4.6 Measurement reliability \| Quantitative… 4.6 Measurement reliability \| Quantitative methods \| Measurement \| UvA	4.6 Measurement reliability \| Quantitative methods \| Measurement \| UvA A measurement instrument should be valid, but also reliable. This video explains what measurement reliability is. Different types of measurement reliability are discussed: test-retest reliability,… test-retest reliability inter-rater reliability intra-observer reliability internal consistency random error systematic error betrouwbaarheid validiteit test-hertest betrouwbaarheid interbeoordelaarsbetrouwbaarheid intrawaarnemersbetrouwbaarheid systematische fout willekeurige fout interne consistentie From Sander Birkhoff 0 likes 1 plays 0 Language English - en Department FMG
3.8 Matching \| Quantitative methods \| Research… duration 6 minutes 31 seconds 3.8 Matching \| Quantitative methods \| Research… 3.8 Matching \| Quantitative methods \| Research Designs \| UvA	3.8 Matching \| Quantitative methods \| Research Designs \| UvA This video introduces the concept of matching participants. Sometimes random assignment is impossible, which increases the selection threat to internal validity. One way to mitigate this threat is to… undermatching regression to the mean random assignment selection threat regressie naar het gemiddelde ondermatching willekeurige toewijzing selectie criterium From Sander Birkhoff 0 likes 2 plays 0 Language English - en Department FMG
5.2 Sampling \| Basic Statistics \| Sampling… duration 8 minutes 12 seconds 5.2 Sampling \| Basic Statistics \| Sampling… 5.2 Sampling \| Basic Statistics \| Sampling Distributions \| UvA	5.2 Sampling \| Basic Statistics \| Sampling Distributions \| UvA This video explains you how the drawing of a sample works. Matthijs discusses some good and poor sampling methods and he also deals with different forms of bias you could encounter along the way. The… sample sampling methods simple random sample sampling bias steekproef steekproefmethoden aselecte steekproef systematische fout From Sander Birkhoff 0 likes 2 plays 0 Language English - en Department FMG
4.4 The variance of a random variable \| Basic… duration 6 minutes 54 seconds 4.4 The variance of a random variable \| Basic… 4.4 The variance of a random variable \| Basic Statistics \| Probability Distributions \| UvA	4.4 The variance of a random variable \| Basic Statistics \| Probability Distributions \| UvA This video explains how the variance of a random variable is calculated. You also learn what happens with the variance when adjusting a random variable or when combining different random variables. summary statistics variance of random variable variance of probability distribution variantie van kansverdeling variantie van kansdistributie From Sander Birkhoff 0 likes 1 plays 0 Language English - en Department FMG
4.3 The mean of a random variable \| Basic… duration 4 minutes 36 seconds 4.3 The mean of a random variable \| Basic… 4.3 The mean of a random variable \| Basic Statistics \| Probability Distributions \| UvA	4.3 The mean of a random variable \| Basic Statistics \| Probability Distributions \| UvA This video explains how to calculate the mean of a probability distribution. You also learn what happens with the mean when adjusting a random variable or when combining different random variables. summary statistics mean of random variable mean of probability distribution gemiddelde van kansverdeling gemiddelde van kansdistributie From Sander Birkhoff 0 likes 1 plays 0 Language English - en Department FMG
4.1 Random variables and probability… duration 6 minutes 40 seconds 4.1 Random variables and probability… 4.1 Random variables and probability distributions \| Basic Statistics \| UvA	4.1 Random variables and probability distributions \| Basic Statistics \| UvA This video explains how a probability distribution describes the possible outcomes of a random variable with their probabilities. Important concepts discussed in this video are: discrete and… uva probability distribution random variable probability mass function probability density function kansverdeling kansdistributie kansdichtheid kansfunctie From Sander Birkhoff 0 likes 1 plays 0 Language English - en Department FMG
3.10 Independence between random events \| Basic… duration 5 minutes 14 seconds 3.10 Independence between random events \| Basic… 3.10 Independence between random events \| Basic Statistics \| Probability \| UvA	3.10 Independence between random events \| Basic Statistics \| Probability \| UvA This video explains independence, a concept in probability theory that you will encounter frequently. uva independence random event onafhankelijkheid onafhankelijkheid van twee of meer gebeurtenissen From Sander Birkhoff 0 likes 1 plays 0 Language English - en Department FMG
3.6 Randomization \| Quantitative methods \|… duration 6 minutes 15 seconds 3.6 Randomization \| Quantitative methods \|… 3.6 Randomization \| Quantitative methods \| Research Designs \| UvA	3.6 Randomization \| Quantitative methods \| Research Designs \| UvA In this video you learn about the importance of random assignment. It allows you to eliminate all possible systematic differences between conditions all at once. You learn about the randomization… random assignment randomization check restricted randomization From Sander Birkhoff 0 likes 1 plays 0 Language English - en Department FMG
3.8 Matching \| Quantitative methods \| Research… duration 6 minutes 31 seconds 3.8 Matching \| Quantitative methods \| Research… 3.8 Matching \| Quantitative methods \| Research Designs \| UvA	3.8 Matching \| Quantitative methods \| Research Designs \| UvA This video introduces the concept of matching participants. Sometimes random assignment is impossible, which increases the selection threat to internal validity. One way to mitigate this threat is to… undermatching regression to the mean random assignment selection threat From Sander Birkhoff 0 likes 1 plays 0 Language English - en Department FMG
3.1 True experiments \| Quantitative methods \|… duration 4 minutes 2 seconds 3.1 True experiments \| Quantitative methods \|… 3.1 True experiments \| Quantitative methods \| Research Designs \| UvA	3.1 True experiments \| Quantitative methods \| Research Designs \| UvA This video introduces you to the concept of true experiments. In the social sciences, causal statements are very susceptible to threats to internal validity. Experimental research designs (true… experimental research design randomized controlled trial rct manipulation comparison random assignment From Sander Birkhoff 0 likes 3 plays 0 Language English - en Department FMG
Randomized Experiments - Introduction duration 6 minutes 29 seconds Randomized Experiments - Introduction Randomized Experiments - Introduction	Randomized Experiments - Introduction This video provides an introduction to randomized experiments. This video is part of a project at the Univeristy of Amsterdam in which instruction videos were produced to supplement a course in… randomized experiments introduction internal validity causality research design gold standard independent variables dependent comparison random assignment causal cause control situation causaliteit children condition aggression variable effect relationship study groups difference manipulation effects conditions experiment chance girls From mhamel1 0 likes 3 plays 0 Language English - en Author Onderzoeksmethoden UvA Department FMG
Randomized Experiments - Designs duration 5 minutes 12 seconds Randomized Experiments - Designs Randomized Experiments - Designs	Randomized Experiments - Designs In this video several randomized experimental designs are discussed. This video is part of a project at the Univeristy of Amsterdam in which instruction videos were produced to supplement a… randomized experiments two-group two group control experiment deisgn experiment random exposure internal internal validity validity history instrumentation selection effect randomly assigned group assignment design posttest pretest solomon four four-group participants variable test groups conditions designs math pre representation differences treatment measures varies combination condition scores researcher level From mhamel1 0 likes 2 plays 0 Language English - en Author Onderzoeksmethoden UvA Department FMG