Table 2 Overview of the measurement instruments across the measurement time points as well as reporting source

Basal self-regulation sub-facets

Inhibition

Fruit-Stroop task

PB

PB

PB

Stroop task

PB

Control variables for Stoop task: items about color weakness/blindness

S

Subscale inhibitory control of the temperament in middle childhood questionnaire (TMCQ)

P

P

P

Working-memory updating

Digit Span Backward (ZN-R) subtest of German Wechsler Intelligence Scale for Children—Fourth Edition (WISC-IV)/Wechsler Adult Intelligence Scale—Fourth Edition (WAIS-IV) [age-appropriate version]

PB

PB

PB

PB

Cognitive flexibility

Cognitive flexibility task

PB

PB

Dimensional change card sorting (DCCS) [age-appropriate version]

PB

PB

Heart rate variability (HRV)

Polar watches (RS800CX, Polar Electro Oy, Kempele)

O

O

BioSign HRV-scanner

O

Control variables for HRV: Questions about variables that might affect HRV-measurement: consume of caffeine/cardioactive substances; in-tensive physical training during the last 24 h; sleep quality and duration of the previous night; time of the last meal

S

Emotional reactivity

Subscale emotional control of the behavior rating inventory of executive function (BRIEF)

P

P

P

S, P

Subscale anger/frustration of the temperament in middle childhood questionnaire (TMCQ)

P

P

Subscale anger of the Buss-Perry-aggression questionnaire

S

Complex self-regulation sub-facets

Emotion regulation strategies

Subscale dealing with anger of the questionnaire to elicit emotion regulation in children and adolescents (FEEL-KJ)

S, P

S, P

S, P

Subscale emotion regulation with anger of the intelligence and development scales (IDS)

S

S

Emotion regulation questionnaire (ERQ)

S

Cognitive emotion regulation questionnaire (CERQ)

S

Affective decision-making

Hungry donkey task [age-appropriate version]

PB

PB

PB

PB

Delay of gratification

Decision questions with real incentives (sweets and toys)

PB

PB

PB

German delay discounting test (DDT)

S

Behavioral control/impulsivity

UPPS impulsive behavior scale (short-version)

S, P

Self-regulation scale (SRS)

S, P

Balloon analogue risk task (BART)

PB

Planning behavior

Subscale plan/organize of the behavior rating inventory of executive function (BRIEF)

T

T

T

S, P

Subscale impulsivity of the barratt impulsiveness scale (BIS)

S

UPPS impulsive behavior scale (short-version)

S, P

Conscientiousness

Subscale conscientiousness of the big five inventory-SOEP (BFI-S)

S

Eating-related SR

Children's/adult eating behavior questionnaire (CEBQ/AEBQ)

P

P

P

P, S

Subscale external eating behavior of the Dutch eating behavior questionnaire (DEBQ)

P

P

P

S, P

Subscale restrictive eating behavior of the Dutch eating behavior questionnaire (DEBQ)

S

S

S

S

Determination of losing weight and changing eating behaviors

S

Subscale emotional eating of the eating behavior disturbance questionnaire

S

Outcome measures and predictors

Weight status

Weight and height

P, O

P, O

P, O

S, O

Body dissatisfaction

Body silhouettes [age-und gender-appropriate version]

S

S

S

S

Male muscularity silhouettes [for males only]

S

Subscale attitudes of the drive for muscularity scale (DMS)

S

Current estimation of one’s own weight status

S

Weight satisfaction

S

S

S

S

Internalized weight stigma

Weight bias internalization scale (WBIS-C)

S

S

S

S

Stigma

Perception of teasing scale (POTS)

S^a

S^a

S

S

Appearance-related social pressure questionnaire (FASD)

S

Self-esteem

Subscale self-esteem of the questionnaire of assessing health-related quality of life (KINDL)

S

S

Subscale self-esteem of the child health questionnaire (CHQ)

S

Rosenberg’s self-esteem scale

S

Prosocial Behavior

experiment on distributive behavior

PB

Questionnaire of prosocial behavior

S

Subscale prosocial behavior of the strengths and difficulties questionnaire (SDQ)

P, T

P, T

P, T

S, P

Moral identity

Questionnaire for moral identity

S

Justice sensitivity

Justice sensitivity inventory for children and adolescents (JSI-CA 5)

S

Loss of Control Eating and Binge Eating

SCOFF

S/P^b

S/P^b

P, S^c

S, P

Questionnaire of eating and weight patterns (QEWP)

S

S

S

S

binge eating and compensatory behaviors as key behavioral features of eating disorders via eating disorder examination (EDE-Q)

S

Loss of control over eating scale (LOCES)

S

Emotional and behavioral problems

Strengths and difficulties questionnaire (SDQ)

P, T

P, T

P, T

S, P

Depressive symptoms

Diagnostic classification systems for mental disorders in childhood and adolescence of the ICD-10 and DSM-IV (DISYPS-KJ)

S

S

Depression test for children of elementary school age (DTGA)

S

Patient health questionnaire (PHQ-8)

S

Anxiety symptoms

Mannheim adolescent questionnaire (MJF)

S

S

Child anxiety test II (KAT-II)

S

Generalized anxiety disorder screener (GAD-7)

S

Social information processing

Scenes for social information processing in adolescence (SSIPA)

S

Aggressive and antisocial behavior

Adult/youth self-report (ASR/YSR), youth self-report; adult/child behavior checklist (ABCL/CBCL)

P

P

P

S, P

Children’s social behavior scale (CSS-T)

T

T, S

T, S

S, P

Instrument for reactive und proactive aggression (IRPA)

T

T

T

S, P

Other variables

Sociodemographic variables

Age, gender

S, P

S, P

S, P

S, P

Socioeconomic status and education

Educational attainment of mother and father

P^e

P

P

Occupation of both parents, household size, monthly household income

P

Winkler-index

P

Subjective perceived social status via McArthur scale

S

Contact with parents

Living space of the child contact frequency with their child

P

Migration background

Language spoken with child/at home; participants’ and parents’ country of birth

P

P

P

S

Pubertal status

Items about sex-specific bodily changes during puberty

S

Cognitive theory of mind

Cartoon task

PB

PB

Belief-desire reasoning task

PB

PB

Affective theory of mind

Cartoon task

PB

PB

Faces scale of Cambridge mindreading face-voice battery

PB

PB

Cognitive processing speed

Digit symbol coding test of the German Wechsler intelligence scale for children—fourth edition (WISC-IV)/Wechsler Adult Intelligence Scale (WAIS-IV) [age-appropriate version]

PB

PB

PB

PB

Family risk factors

Family adversity index (FAI)

P

P

P

Current burden

Questions about perceived extent of corona-related stress as well as the stress caused by the current global political situation

S

Use of mental health services

Questions about adolescents’ utilization of therapy

S, P

Level of personal functioning

Operationalized psychodynamic diagnostics—structural questionnaire short version (OPD-SQS)^d

S

Social media use

Questions about time spent on physical activity and media

S, P

S, P

S, P

S, P

Adolescents’ usage of social media (frequency and duration of series consumption; active and passive social media use)

S

Subscale media pressure from the sociocultural attitudes towards appearance questionnaire IV-R (SATAQ IV-R)

S

Academic performance

Potsdam Teacher Questionnaire (school skills of the child)

T

T

T

Grades in reading and spelling (T1–T3) and mathematics (T3)

P

P

P

Perceived academic accomplishments relative to peers via visual analog scale

S

Social desirability

Short version of the scale for detecting test manipulation through faking good and social desirability bias (SEA-K)

S

Parental weight status

Parent report about their own body weight

P

P

P