Condition category
Not Applicable
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status
No longer recruiting
Publication status

Plain English Summary

Background and study aims
This study is linked to the Birkbeck UNLOCKE project ( This phase of the study assesses whether the counterintuitive concepts intervention 'Stop and Think' produces improvements in children's scientific and mathematical understanding.

Who can participate?
Children in Years 3 and 5 (ages 8 and 10) from about 80 primary schools across England

What does the study involve?
Classes are randomly allocated to either an intervention, active control or passive control group. Both the intervention and active control groups participate in teacher-led computer-based programmes. The intervention is 'Stop and Think', which uses content based on the maths and science curriculum and is delivered as a short session before the children's maths or science lesson. The active control is See+, with content based on the Personal, Social and Health Education (PSHE) curriculum. Both are delivered three times a week for a period of 10 weeks. The passive control group continue with "business as usual". The children's maths and science test scores are compared before and after the study to assess whether the intervention has affected their mathematical and scientific understanding.

What are the possible benefits and risks of participating?
This study may identify whether the Stop and Think computer programme is a useful tool in boosting children's mathematical and scientific understanding and whether it could and should be rolled out more widely. The way the study has been designed means that all schools get to use the computer-based intervention in either year 3 or year 5. Since the intervention and control is split along the year groups children are unlikely to feel like they are missing out. Some children may find the process of testing stressful but it will be completed in the familiar classroom environment.

Where is the study run from?
National Foundation of Educational Research (UK)

When is study starting and how long is it expected to run for?
January 2017 to November 2017

Who is funding the study?
Education Endowment Foundation (UK)

Who is the main contact?
Simon Rutt

Trial website

Contact information



Primary contact

Mr Simon Rutt


Contact details

National Foundation of Educational Research
The Mere
Upton Park
United Kingdom

Additional identifiers

EudraCT number number

Protocol/serial number


Study information

Scientific title

UNLOCKE: Understanding the learning of counterintuitive concepts in science and mathematics education through a behavioural and neuroimaging study of year 3 and year 5 primary-school inhibitory control training (in comparison to social skills training or lessons as usual)


Study hypothesis

This research trial is linked to the Birkbeck registered trial ISRCTN54726482. It is the External Statistical Evaluation of the intervention.

The primary research question is: does the use of the counterintuitive learning intervention impact on learners' mathematics and science achievement?

The secondary research is: what is the impact of the counterintuitive learning intervention on learners' inhibition control? An additional secondary research question will explore if there is an impact of the social skills computer programme, used by the control plus group, on learners' mathematics and science achievement in comparison to the counterintuitive concepts programme. This will determine if any identifiable effect is due to using a computer programme rather than any specific content.

Ethics approval

Birkbeck received approval from University College London Research Ethics Committee, 01/07/2017, ref: 1602/006. The final trial design will be reviewed by NFER's ethics and code of conduct committee. The trial does not include the solely Birkbeck-based additional neurocognitive testing which required opt-in parental consent.

Study design

Multicentre interventional cluster randomised controlled trial

Primary study design


Secondary study design

Cluster randomised trial

Trial setting


Trial type


Patient information sheet

Not available in web format, please use the contact details to request a patient information sheet


Inhibitory control and maths and science performance in primary school education


Multicentre interventional 10-week trial with random allocation of groups to intervention, active and passive control conditions assessed by blind evaluators. A cluster design is planned, where year 3 and year 5 groups will be randomly allocated to either the intervention or control/control plus with 1:1 ratio. This will be unbalanced design with a ratio of 2:1:1 for the intervention versus the control and control plus. This will mean that no school is solely a control school which will help with recruitment and reduce attrition.

Classes assigned to intervention will receive the teacher-led computer-based activity called 'Stop and Think', which will introduce children to counterintuitive concepts in mathematics and science. This will occur as a 12-minute intervention prior to mathematics or science lessons three times a week.

Classes assigned to control will carry on 'business-as-usual'.

Classes assigned to control plus will receive a teacher-led computer-based learning activity called See+, which will occur during PSHE lessons. During this activity, children observe and reflect upon social interactions and engage in social-emotional learning through a series of computerised animated stories with virtual characters engaging in social scenarios.

All statistical analysis of the intervention impact will be conducted at the pupil level, comparing the average pupil maths and science scores in the intervention group with average scores in the control groups. The average difference will be measured in a multilevel linear regression model that takes account of pre-test score as covariate, along with the stratification variable used at randomisation (whether the school is a one form entry or two form entry). a three level model will be created to account for pupils being clustered within classes and within schools. The main analysis will be 'intention to treat', reflecting the reality of how interventions are delivered in practice and avoiding attrition bias.

Intervention type



Drug names

Primary outcome measure

Mathematics and science year 3 and year 5 outcomes measured using the GL Assessments Progress Test in Maths and Progress Test in Science at 2 weeks following intervention completion. PTM8 and PTS8 will be used for year 3 and PTS10 and PTM10 will be used for year 5. Key Stage 1 assessment data is used as a pre-test measure (and therefore covariate in any analysis). A combined KS1 assessment measure will be used that would include task/test assessments in reading, writing and maths as the correlation with science outcomes at KS2 is still strong.

Secondary outcome measures

Pupil scores on the chimeric animal Stroop task at 2 weeks following intervention completion

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

1. In Year 3 and 5 (approximate ages 8 and 10) of one of our participating schools
2. Male or female
3. Consent given with not opting-out

Participant type


Age group




Target number of participants

All Year 3 and Year 5 pupils present in the selected schools, apart from those who have opted-out. This equates to ~6700 children across ~280 classes in ~80 schools.

Participant exclusion criteria

Participants will be excluded from the statistical analysis if the parental opt-out form is received by Birkbeck

Recruitment start date


Recruitment end date



Countries of recruitment

United Kingdom

Trial participating centre

National Foundation for Educational Research
The Mere Upton Park
United Kingdom

Sponsor information


Education Endowment Fund (EEF)

Sponsor details

9th Floor
Millbank Tower
21-24 Millbank
United Kingdom

Sponsor type




Funder type


Funder name

Education Endowment Foundation (EEF) (UK)

Alternative name(s)

Funding Body Type

Funding Body Subtype


Funder name

Wellcome Trust

Alternative name(s)

Funding Body Type

private sector organisation

Funding Body Subtype

International organizations


United Kingdom

Results and Publications

Publication and dissemination plan

The protocol will published online shortly after the trial is registered. The statistical analysis plan will be published early next year. Study results will be published as a part of a joint EEF publication with other RCT research studies in November 2018. The publication will be freely available to download. The research itself will be peer reviewed prior to publication.

IPD sharing plan
The evaluator (NFER) will submit the trial data to EEF’s data contractor Fisher Family Trust (FFT). FFT will collate and anonymise the data for upload to the UK Data Archive. The archived data will be available in an anonymised form with restricted access for research purposes only.

Intention to publish date


Participant level data

Stored in repository

Basic results (scientific)

Publication list

2019 results in (added 11/09/2020)

Publication citations

Additional files

Editorial Notes

11/09/2020: Publication reference added.