A neutral stimulus (NS) is something that produces a particular response.

A 9-year-old girl is more likely to pay attention to the behaviour being modelled by their 5 year old brother than their 12-year-old sister. 

Behaviourists focus on stimulus and response.

Self-concept is not explored within the humanistic approach.

Research into the psychodynamic approach provides us with quantitative data.

The cognitive economy principle is where the brain organises information into classes, or hierarchies.

Interactionist theory applies to learning from objects and surroundings.

A fixed mindset is where personality traits are attributed to learning through effort, training and practice.

A growth mindset is where personality traits can't be changed through training.

The theory of planned behaviour model can be a good way to set goals based on subjective norms, attitude towards behaviour and perceived behavioural control.