1. Conduct a power analysis and recruit a sufficient number of participants with a diversity of age and gender.
2. Randomly assign participants in the experimental and control conditions.

2. Data Collection

1. Seat participants in individual cubicles, each equipped with a computer and headphones.
2. Tell participants that they were going to complete two separate studies and give participants two packets of material, one for each study.
   1. In truth, the first portion of the study (i.e., the materials in the first packet) is used to induce the desired emotion without letting the participant know that the two supposedly separate studies are related.
3. Manipulate the first independent variable at this time. Participants are randomly assigned to one of two conditions:
   1. In the selling condition, give them a highlighter set and instruct that they will use it in the subsequent study.
   2. In the choice condition, do not give them a highlighter set.
4. Induce specific emotions.
   1. Instruct each participant to complete a self-report questionnaire called the Positive and Negative Affect Schedule, which assesses their baseline emotions.
      1. This baseline measure is used to ensure that pre-existing emotions  are not attributed to the emotion manipulation.
   2. Manipulate the second independent variable using a video clip meant to induce emotions. Randomly assign participants to watch one of three 4-min clips.
      1. In the sadness condition, participants watch a 4-min scene from a sad movie (involving the death of a boy’s mentor).
         1. Ask the participants to imagine what it would feel like if they were personally in the situation shown in the clip and to write down their feelings.
      2. In the disgust condition, participants watch a disgusting 4-min scene from a film (involving a man using an unsanitary toilet).
         1. Ask the participants to imagine what it would feel like if they were personally in the situation shown in the clip and to write down their feelings.
      3. In the neutral condition, participants watch a 4-min scene from a documentary about nature (involving fish in the Great Barrier Reef).
         1. Ask the participants to simply write about their daily activities.
5. Tell participants that they now have to complete the second study next and to open the second packet of instructions.
   1. Participants who were previously assigned to the selling condition are presented with a list of 28 prices, ranging from $0.50 to $14, and are asked to indicate, for each price, whether they would prefer to sell the highlighter set or keep it.
   2. Participants in the choice condition are shown the highlighter set at this time and then given the same list of 28 prices as participants in the selling condition. They are asked if they would rather have the amount of money listed or the highlighter set.
6. Emotion induction manipulation check: This is designed to show that emotions were manipulated as intended.
   1. Present participants with a list of 27 affective states and ask them to indicate whether they feel each affective state listed on a scale, ranging from 0 (do not experience emotion at all) to 8 (experience the emotion more strongly than ever before).
      1. Among these affective states are five key items that relate to sadness (e.g., blue, downhearted, and sad) and disgust (e.g., disgust and repulsed).
7. Fully debrief participants.

3. Data Analysis

1. Examine the average cost at which participants would sell their highlighter set (selling condition) or choose the highlighter set (choice condition).
2. Compare these means for those in each of the emotion conditions and analyze using planned 2 x 2 contrasts in ANOVA as in the original paper, or ideally, using a 2 x 3 ANOVA.