research methods lec 1 Flashcards
define
theory
systematic way of organising and explaining observations
different schools of thought promote diff theories
define
hypothesis
the doubtful belief about the way one variable interacts/impacts another
purposes of research _
4
for the sake of it = understanding, curiosity
predicting outcomes = health
solving problems
improving standards of living
good research is grounded in __
theory
___ provides a framework for a __
theory
hypothesis
define
variable =
an event/behaviour that has at least 2 values
2 types of variables
continuous and categorical
__ types of variables and define =
2
1= categorical 2 = continuous
categorical = fixed values continuous = continum of values
define population
entire group of elements that share a set of specific common characteristics that are pre-defined by the researcher and to which a piece of research is meant to generlise
define sample
a subset of the pop. who are supposed to be representative of the population they were selected from
define
sampling frame/accessible population
teh actual group of individuals from which the researcher is able yo select a sample
this may not always be the exact same as the intended target pop
In order for a sample to be valid is must = __
be representative
__ types of sampling methods
2
1 = probability sampling 2= nonprobability sampling
subsets of probability sampling + define
= every element has an equal chance of being selected into sample
3
simple random
cluster
stratified
subsets of non probability sampling + define
= uneqal chance of being selected
4
convenience (haphazard) sampling
purposive
quota
snowball
define
generlisability
whether the research results ( from sample) can be applied to the entire pop of interest and requires
IV and EV