Psychology Non-defining relative clauses B2 - Exercise Worksheet

Level 4 · PsychologyReading People: The Science of Dark Personalitiesclassplan.aiGrammar

GrammarPsychology · Non-defining relative clauses

Non-defining relative clauses

Article excerpt · target grammar marked

Professor Robert Hare published a checklist of 20 traits, which is still widely used today. Dr Karen Mitchell, who spent 30 years as a business consultant, became fascinated by a gap in this research.

Grammar Reference · Non-defining relative clauses

Form with who

Use who for people: Dr Mitchell, who spent 30 years as a consultant, began a PhD. Always add commas.

Form with which

Use which for things: The checklist, which was published in 1980, is still used. Never use that.

Extra information only

Remove the clause and the sentence still makes sense: Dr Mitchell began a PhD. The clause just adds detail.

Common error

The research, that took five years... ✗ → The research, which took five years... ✓ — always which, not that

01Exercise 1 — Form · Write the Correct Form

Non-defining relative clauses

1.Professor Hare published his checklist in 1980. It changed how psychopathy was studied. → Professor Hare published his checklist in 1980, changed how psychopathy was studied.

2.Dr Mitchell interviewed social workers. They described the same traits again and again. → Dr Mitchell interviewed social workers, described the same traits again and again.

3.The PhD took five years to complete. It drew on interviews from many fields. → The PhD, took five years to complete, drew on interviews from many fields.

4.Mitchell built four clusters of traits. They cover control, exploitation, dishonesty, and emotion. → Mitchell built four clusters of traits, cover control, exploitation, dishonesty, and emotion.

5.HR managers were interviewed for the study. They all expressed fear of these individuals. → HR managers, were interviewed for the study, all expressed fear of these individuals.

6.The existing checklists were based on prison data. This made them less useful in workplaces. → The existing checklists were based on prison data, made them less useful in workplaces.

02Exercise 2 — Find and Correct the Error

find the error · rewrite the sentence

1.Professor Hare, that published his checklist in 1980, is still a key figure in the field.

2.Mitchell interviewed professionals who they came from very different backgrounds.

3.Her PhD, which published in 2024, drew on five years of interviews.

4.The four clusters, that Mitchell identified, cover control, exploitation, dishonesty, and inner life.

03Exercise 3 — About You

in your notebook

Personalise: complete five sentences about yourself using the target grammar.

Non-defining relative clauses01classplan.ai