Table 1.

EDA-Q items that met inclusion criteria and the closest corresponding DISCO items that were identified

EDA-Q items (18 items)	Corresponding DISCO items (17 items)	DISCO variables
Obsessively resists and avoids ordinary demands	Lack of co-operation	LACKCOP
Has difficulty complying unless carefully presented
Is driven by the need to be in charge	Using age peers as mechanical aids, bossy and domineering	CPEERAD*
Tells other children how to behave
Finds everyday pressures intolerably stressful	Anxiety	ANXIETY
Mimics adult mannerisms and styles	Repetitive acting out roles	CTROL*
Shows little shame or embarrassment	Behaviour in public places	BEHAPUB
	Embarrassing remarks in public	REMARK
Good at getting around others	Apparently manipulative behaviour	MANBEH*
Unaware of differences between self and authority figures	Awareness of own identity	CIDENT*
Attempts to negotiate better terms with adults
If pressurised to do things, may have a ‘meltdown’	Temper tantrums	TEMPER
Mood changes rapidly	Changeable mood	MOODCH
Knows what to do or say to upset specific people	Difficulties with other people	DIFPEOP
Blames or targets a particular person	Harassment of others	HARAS*
	Blaming other people	BLAME*
Denies behaviour, even when caught red-handed	Fantasising, lying, cheating, stealing	LYING*
Outrageous behaviour to get out of doing something	Socially shocking behaviour	SHOCK*
Extreme emotional responses to small events	Inappropriate sociability (rapid, inexplicable changes from loving to aggression)	CINAPP*
Social interaction has to be on his/her own terms	One-sided social approaches	CONESID

Items that were included in Wing and Gould’s draft 15-item PDA list are designated with an asterisk