Implementation of the official protocol --------------------------------------- **Experimenters** A research assistant with extensive training in running behavioral experiments will be hired to collect the data. The research assistant has a master's degree in psychology. **Piloting / training** The experiment will be piloted first with other lab members and then with a few undergraduate students to make sure that the experimenter is well familiar with the protocol and that everything works according to plans. **Experimenter knowledge of expected outcomes** The experimenter is familiar with the ego depletion phenomenon. **Recruiting** We will recruit participants from our subject pool of undergraduate students at Linköping University using the online recruitment system for behavioral experiment ORSEE. The study will be described as being on “word and number recognition and reaction time”. Independent of the current experiment individuals in our subject pool are asked if they are fluent in English. Only those subjects who indicate that they are fluent in English and who are between 18 and 30 years old will be included in the study. Currently, about 40 % of the subjects in our subject pool are females. We will seek to have a balanced sample with regards to gender by including equal number of men and women. **Sample, subjects, and randomization** We plan to run participants, in blocks of 10, until we have 50 observations in each condition. Each subject will be psuedo-randomly assigned to either the ego-depletion condition or the control treatment. **Setting/Lab/Equipment** Subjects will be alone in an office with the experimenter sitting close by but out of sight, i.e. behind a divider wall. The experiment will be run on a PC with a 23 inch screen. **Procedure** We will be running the study according to the official protocol (Protocol_49TQVF; Step-by-step_KCWW2005) but with the following changes: Participants are greeted in Swedish, asked to sit at a desk and to turn off their cell phone so that it does not distract them during the experiment. After participants have read the information sheet, asked any questions, and filled out the consent form and a very brief demographic questionnaire (including age, gender, and four questions concerning their English proficiency), they are told (in Swedish) that because the experiment is conducted as part of a large international collaboration, the remainder of the study will be conducted in English. The rest of the procedure follows the official protocol (see codes above), except the following sentence has been omitted because it seemed to cause confusion in the pilot study: "A word is also considered as containing a lonely ‘e’ if the lonely ‘e’ appears right at the end/beginning of the word or only one letter away from the end/beginning of the word, as in the words ‘instructed’ and ‘respond’." We have also added a very brief questionnaire (15 questions, less than 5 minutes) at the end of the study. Thus, after participants have completed the e-prime tasks, they are asked what they think was the purpose of the study and then fill out the questionnaire. They are then debriefed, given an opportunity to ask questions, and thanked for their participation.