The inspection devices can rotate by being driven by a motor, and the position information can be obtained with a photoelectric switch and coder wheel.
The 24- and 42month assessments were videotaped and rated for several parenting behaviors by trained coders.
Reliability between two different coders was then obtained by recoding independently 20 % of the samples from each group.
To ensure reliability, 10 % of the adjective utterances from a random sample of transcripts were coded independently by a fourth coder.
Although disorganized attachment behavior is necessarily difficult to observe and often subtle, many researchers have managed to become reliable coders.
Two independent coders performed a pilot test on thirty randomly selected articles.
Disagreements were resolved by the more experienced coder reviewing the videotape.
Disagreements were resolved in favor of the primary coder.
