Concordance rate
Twin studies
(allow psychologists to study the Probability that a pair of individuals will have
influence of nature (genes) characteristic in common- or match/ agreement of a
and nurture (environment) on human n High concordance rate for any beh
behaviour. characteristic among DZ twins suggests be
influenced by environment.
Comparison between different types of
twins can help reveal if genes or n High concordance rate for any beh
characteristic among MZ twins suggests be
environment have more influence over
influenced by genetics.
behaviour and characteristics).
Discordance= a non-match/ disagreement of a trait
Strength
Weaknes
One strength of twin studies is that they are high in One weakness of twin studies is tha
validity as the twins’ behaviour is recorded based on validity, as although MZ twins may
their zygosity so inherited traits can be investigated genetic make-up, genes turn o
between MZ and DZ twins. This is a strength because different point in life and through i
it should improve the accuracy of reasons behind the differing environmental experienc
development of some behaviours and disorders like although both twins may have a
schizophrenia. or vulnerability to schizophrenia fo
one may develop it due to environm
One strength of twin studies is that they are high in
reliability as today, more women are having twins due One weakness of twin studies is th
to the advancement of fertility treatment, making it have to us twins as their sample fo
possible to research twins with larger twin behaviour may not be represe
samples. Therefore, it is easy to replicate more children. For example we are still
twin behaviour. Therefore, results
studies with strong statistics to check for the
reasons behind some behaviours an
consistency of data on the reasons behind some schizophrenia cannot be gene
behaviours and disorders such as schizophrenia. children.
, What is the adoption method
in psychology? Adoption Studies
This when groups of adoptees are studied
and correlated with their adopted
families and their natural families
Strength
Weakness
How could we One strength of adoption studies is that
the children are observed in their typical One weakness of adoption studies is that
draw conclusions about behaviour environment of their family, school or home they are not representative of all children as
from adoption studies? environment. This means that these studies the participants are adopted and living apart
have high ecological validity as the results may from their biological parents. This means
be representative of whether their behaviour, that the results can be generalised to
If the behavior is more similar such as the development of disorders such as
to the adopted family then we can most children in terms of whether
schizophrenia, is due to nature or nurture. their behaviour, such as the development
assume behavior is due to nurture
and vice versa with the natural family of disorders such as schizophrenia, is due to
One strength of adoption studies is that it uses nature or nurture.
standardised measures to study adoptees and
their behaviour and characteristics are One weakness of adoption studies is
Why use the adoption method in then correlated with their adopted families and that not all children are adopted at the same
their natural families. This means that the age, so the impact of the biological parents
psychology? research can be easily replicated to check for
To measure whether behavior is a result may be more or less profound for some
consistency of results of whether children more than others. This is a
of nature or nurture their behaviour, such as the development weakness because it may be more difficult
of disorders such as schizophrenia, is due to to accurately understand whether behavior,
nature or nurture in future studies. such as the development of schizophrenia,
•Adoption studies are another is due to nature or nurture.
method which allow psychologists to
study the influence
of nature (genes) and nurture (envir
onment) on human behaviour.
•Groups of adoptees are studied and
their behaviour and characteristics
are then correlated with
their adopted families (the adoptee
method) and their natural families
(the familial method).
Twin studies
(allow psychologists to study the Probability that a pair of individuals will have
influence of nature (genes) characteristic in common- or match/ agreement of a
and nurture (environment) on human n High concordance rate for any beh
behaviour. characteristic among DZ twins suggests be
influenced by environment.
Comparison between different types of
twins can help reveal if genes or n High concordance rate for any beh
characteristic among MZ twins suggests be
environment have more influence over
influenced by genetics.
behaviour and characteristics).
Discordance= a non-match/ disagreement of a trait
Strength
Weaknes
One strength of twin studies is that they are high in One weakness of twin studies is tha
validity as the twins’ behaviour is recorded based on validity, as although MZ twins may
their zygosity so inherited traits can be investigated genetic make-up, genes turn o
between MZ and DZ twins. This is a strength because different point in life and through i
it should improve the accuracy of reasons behind the differing environmental experienc
development of some behaviours and disorders like although both twins may have a
schizophrenia. or vulnerability to schizophrenia fo
one may develop it due to environm
One strength of twin studies is that they are high in
reliability as today, more women are having twins due One weakness of twin studies is th
to the advancement of fertility treatment, making it have to us twins as their sample fo
possible to research twins with larger twin behaviour may not be represe
samples. Therefore, it is easy to replicate more children. For example we are still
twin behaviour. Therefore, results
studies with strong statistics to check for the
reasons behind some behaviours an
consistency of data on the reasons behind some schizophrenia cannot be gene
behaviours and disorders such as schizophrenia. children.
, What is the adoption method
in psychology? Adoption Studies
This when groups of adoptees are studied
and correlated with their adopted
families and their natural families
Strength
Weakness
How could we One strength of adoption studies is that
the children are observed in their typical One weakness of adoption studies is that
draw conclusions about behaviour environment of their family, school or home they are not representative of all children as
from adoption studies? environment. This means that these studies the participants are adopted and living apart
have high ecological validity as the results may from their biological parents. This means
be representative of whether their behaviour, that the results can be generalised to
If the behavior is more similar such as the development of disorders such as
to the adopted family then we can most children in terms of whether
schizophrenia, is due to nature or nurture. their behaviour, such as the development
assume behavior is due to nurture
and vice versa with the natural family of disorders such as schizophrenia, is due to
One strength of adoption studies is that it uses nature or nurture.
standardised measures to study adoptees and
their behaviour and characteristics are One weakness of adoption studies is
Why use the adoption method in then correlated with their adopted families and that not all children are adopted at the same
their natural families. This means that the age, so the impact of the biological parents
psychology? research can be easily replicated to check for
To measure whether behavior is a result may be more or less profound for some
consistency of results of whether children more than others. This is a
of nature or nurture their behaviour, such as the development weakness because it may be more difficult
of disorders such as schizophrenia, is due to to accurately understand whether behavior,
nature or nurture in future studies. such as the development of schizophrenia,
•Adoption studies are another is due to nature or nurture.
method which allow psychologists to
study the influence
of nature (genes) and nurture (envir
onment) on human behaviour.
•Groups of adoptees are studied and
their behaviour and characteristics
are then correlated with
their adopted families (the adoptee
method) and their natural families
(the familial method).
