1. Participant Recruitment

1. Conduct a power analysis and recruit a sufficient number of participants and obtain informed consent from the participants.
2. Randomly assign participants to one of three conditions: Nonconscious affiliation prime, conscious affiliation goal, or no goal.

2. Data Collection

1. Bring participants to a computer station and tell them that they will be completing several unrelated experiments, the first of which is a test of visual acuity (actually a subliminal priming task).
2. Seat participants in front of the computer.
   1. When sitting upright, make sure that the distance between their eyes and a fixation point in the center of the computer screen (three asterisks) should be approximately 99 cm (39 in.).
      1. Marks can be made on the floor of the room and on the computer stand to ensure that the chair and monitor are the proper distance from each other.
      2. This ensures that the stimuli presented are outside of the participant's foveal visual field.
3. Note that all instructions should appear on the computer screen.
   1. All characters presented on the computer screen should be black text on a white background.
   2. Participants will read that the researchers are interested in how quickly and accurately people respond to visual stimuli, and that very brief flashes will appear on the screen at unpredictable places and times.
   3. Their task is to decide as quickly and accurately as possible whether the flash appeared on the right or left side of the screen.
4. Emphasize to participants that because of the unpredictable timing and location of the flashes, the best way to detect all of them quickly is to keep their eyes focused on the fixation point-three asterisks-in the center of the screen at all times.
5. Also have them place their index fingers on two keys labeled "left" and "right".
6. Watch as participants complete six practice trials and answer any questions they may have to ensure they understand the task. After the practice trials the actual task will begin.
7. Have participants perform the priming task, based upon their group assignment.⁴
   1. Nonconscious affiliation prime: Participants will be primed with four words related to the concept of affiliation: affiliate, friend, partner, and together.
      1. Have the four words each appear 20 times on the computer screen in a random order, for a total of 80 trials.
   2. Conscious affiliation goal: Participants will be complete a similar "priming" task (though this condition is not meant to subliminally prime any particular concept) and they will be primed with two words: neutral and background.
      1. Have the two words each appear 40 times on the computer screen in a random order, for a total of 80 trials.
   3. No goal: Participants will be complete a similar "priming" task (though this condition is not meant to subliminally prime any particular concept) and they will be primed with two words: neutral and background.
      1. Have the two words each appear 40 times on the computer screen in a random order, for a total of 80 trials.
   4. Note the following stimulus design details.
      1. Each stimulus word should flash for 60 ms and should be immediately followed by a 60-ms masking string of letters in the same location. The masking string can be "XQFBZRMQWGBX" (as originally designed)⁵ to present a variety of letter patterns and therefore to be structurally similar to the preceding stimulus words.
      2. The screen refresh rate should be 15 ms or faster, such that the presentation length of 60 ms is adequate to ensure that the stimulus words and masks are always exposed to the participants.
      3. The stimulus word and mask should appear at one of four locations on the computer screen equidistant from the fixation point at angles of 45°, 135°, 225°, and 315° (one in each of the four quadrants).
      4. Construct one randomized location order and give all participants the same sequence of locations.
      5. Within a particular location, place each word so that the center of the word is 7.6 cm from the fixation point. At this distance, the stimulus words will be within the parafoveal visual field (from 2° to 6° of visual angle) and outside the foveal visual field associated with conscious awareness.^6,7
      6. Have the amount of time between word presentations (including the stimulus word and the mask) vary from 2 to 7 s to enhance the "visual acuity/reaction time task" cover story. All participants should receive one randomized order of time interval lengths.
      7. Because participants are told to focus on the central asterisks throughout the task, the stimulus words are flashed for 60 ms each, and 140 ms has been shown to be the minimum time required to move the eyes away from an initial fixation point toward a parafoveally presented stimulus word, it should not be possible for participants to see the stimulus words, even if they immediately looked toward the location of the flash.
8. In the second phase of the experiment, have participants complete a memory task in which they are to remember the behaviors of another participant and the order in which they occurred (based on Chartrand and Bargh).⁴
   1. Example behaviors of another participant:
      Had a party for some friends last week
      Helped a woman fix her bicycle
      Checked some books out of a library
      Wrote an articulate letter to his congressman
      Subscribes to sports magazines
      Jogs every morning before going to work
      Volunteered to teach a Sunday school class at his church
      Went skiing in Colorado for the weekend
      Caught the error in the Mechanic's calculations
      Read the bible in his hotel room
   2. Do not refer to the fact that the phrases describe behaviors, and do not mention whether the behaviors describe the same person.
9. Create two random orders of these various behaviors.
   1. Present participants with one of the two orders and ensure that the random orders are completely crossed with condition.
   2. Present each behavior predicate for 8 s, with a 1-s pause before the next one.
10. Following the presentation of the various behaviors, have participants complete a 3-min filler task to eliminate any short-term memory effects (e.g., recency and primacy effects) on free recall.
    1. As part of another ostensibly unrelated experiment, this filler task should require participants to generate arguments both for and against three controversial issues (i.e., abortion, gun control, and capital punishment).
11. Following this filler task, administer the surprise free-recall test. Give participants a maximum of 4 min to recall the exact order in which the behavior predicates were presented.
12. Following the memory task, have participants watch a "live feed" of the other participant (actually a confederate videotaped earlier) performing four mundane clerical tasks in an adjoining room: filing papers, answering the phone, stapling papers, and typing at a computer.
13. For participants in the conscious affiliation goal condition, explicitly state that they would soon be interacting with the person next door on a cooperative task for which it was very important to get along and work together well.
14. After receiving these instructions, have participants watch the confederate, who will be touching her face during and between clerical tasks.
15. While participants watch the tape, surreptitiously video-record them, so that independent coders (who will be unaware of the study's purpose and participant's condition) can measure the amount of face touching that the participant engaged in.
16. After this final phase of the experiment, have participants complete a thorough debriefing that probes for (a) general suspicions (e.g., if they did not think the "live feed" video was real or, in the conscious-affiliation goal condition, that they would be interacting with a person next door), (b) what they thought the flashes were during the vigilance task, and (c) whether they noticed any particular mannerisms exhibited by the confederate.
17. Measure interrater reliability.
    1. Have two independent judges code the amount of time participants spend touching their faces while watching the videotape and compute inter-rater reliability.
    2. The dependent measure is amount of time spent face touching (s/min).
    3. NOTE: In the original study, one judge coded 100% of the tapes, and another coded 55% of the tapes. Interjudge reliability for the overlapping ratings was significant: r(28) = 0.98, p < 0.001. The authors therefore averaged the two judges' estimates of participants' face touching for the overlapping ratings to form a single index. For the remaining participants, the single judge's estimates of face touching were used as the primary dependent measure.

3. Data Analysis

1. Compute a between-subjects one-way ANOVA with goal (nonconscious, conscious, no goal) as the independent variable and time spent face touching as the dependent variable.
2. However, because the original authors predicted no differences in mimicry between two of the three groups, a planned comparison was also run to test their a priori hypothesis that participants with a conscious or nonconscious affiliation goal would mimic more than those without such a goal.