Predictive valid
– The degree to which scores
assessment are related to perfor
on a criterion that is administere
future
• Outcome of rating accurately p
aspects of the babies future
development
• McCormick et al (2016) – Babie
are securely attached have bet
Streng outcomes in childhood (achieve
in school, less likely involved bu
ths and later adulthood
• Ward et al (2006) better menta
in adulthood
• Measuring something real in a b
development
, Reliability – Can the
be repeated and similar results ac
• The study is deemed to be reliable
been replicated and similar results
been found
• This is due to its high control and
standardised procedure – strength o
a lab experiment
• Wartner et al (1994) conducted sim
experiment in Germany and found t
of children were securely attached
Streng Inter rater reliabi
ths – Extent different observers ag
ratings
• Bick et al (2012) tested inter rat
reliability for a team of trained
observers and found agreement
cases
– The degree to which scores
assessment are related to perfor
on a criterion that is administere
future
• Outcome of rating accurately p
aspects of the babies future
development
• McCormick et al (2016) – Babie
are securely attached have bet
Streng outcomes in childhood (achieve
in school, less likely involved bu
ths and later adulthood
• Ward et al (2006) better menta
in adulthood
• Measuring something real in a b
development
, Reliability – Can the
be repeated and similar results ac
• The study is deemed to be reliable
been replicated and similar results
been found
• This is due to its high control and
standardised procedure – strength o
a lab experiment
• Wartner et al (1994) conducted sim
experiment in Germany and found t
of children were securely attached
Streng Inter rater reliabi
ths – Extent different observers ag
ratings
• Bick et al (2012) tested inter rat
reliability for a team of trained
observers and found agreement
cases
