The intervention is a ChatGPT-powered mind wandering bot configured using a 15-minute guided exercise adapted from Hafenbrack et al. (2014), Clinton et al. (2018), and Arch and Craske (2006). The session is divided into one-minute segments: the first minute provides settling instructions (for example, inviting participants to adopt a comfortable position), followed by step-by-step guidance of the mindfulness breathing exercise. To foster reflection and encourage active engagement, the chatbot was trained to interact with the participants using interactive prompts. This includes asking questions, such as "When you are ready, please share...What feeling or memory stood out most clearly as your mind wandered?", "When you are ready, please share...where did your attention drift... to just now?".

The intervention is a ChatGPT-powered mindfulness breathing bot configured using a 15-minute guided exercise adapted from Hafenbrack et al. (2014), Clinton et al. (2018), and Arch and Craske (2006). The session is divided into one-minute segments: the first minute provides settling instructions (for example, inviting participants to adopt a comfortable position), followed by step-by-step guidance of the mindfulness breathing exercise. To foster reflection and encourage active engagement, the chatbot was trained to interact with the participants using interactive prompts. This includes asking questions, such as " Share what this present moments feel like for you", "What sensations do you notice in your abdomen as you place your hand there?", "Share what stood out to you as you noticed your thoughts, feelings, or sensations just now.".

The intervention is a ChatGPT-powered mindfulness breathing bot configured using a 15-minute guided exercise adapted from Hafenbrack et al. (2014), Clinton et al. (2018), and Arch and Craske (2006). The session is divided into one-minute segments: the first minute provides settling instructions (for example, inviting participants to adopt a comfortable position), followed by step-by-step guidance of the mindfulness breathing exercise. To foster reflection and encourage active engagement, the chatbot was trained to interact with the participants using interactive prompts. This includes asking questions, such as " Share what this present moments feel like for you", "What sensations do you notice in your abdomen as you place your hand there?", "Share what stood out to you as you noticed your thoughts, feelings, or sensations just now.".

Participants' current stress levels will be measured with a single item ("How stressed do you feel right now?"), rated on an 11-point scale (0 = No stress, 10 = Extreme stress).

Participants' affective states will be measured using the 18-item Circumplex Model of Affect Scale (Russell, 1980), which assesses emotional states across two separate dimensions: positive affect (PA) and negative affect (NA). Participants are required to indicate the extent to which they currently experience each emotion on a 5-point Likert scale (1 = Not at all, 5 = Extremely), in response to the question, "Overall, how do you feel right now?".

Participants' state anxiety levels will be measured with the 6-item Spielberger State-Trait Anxiety Inventory (STAI; Marteau & Bekker, 1992), rated on a 4-point Likert scale (1 = Not at all, 4 = Very much). Participants are required to rate how they generally feel in response to statements presented (e.g., "I feel calm", "I am tense", "I feel upset").

Participants' self-control capacity will be measured with the 5-item Brief State Self-Control Capacity Scale (SMS-5; Ciarocco et al., 2009; Linder et al., 2015), rated on a 7-point Likert scale (1 = Very untrue of me, 7 = Very true of me). Participants are required to rate how they feel in response to the statements presented (e.g., "I feel drained now", "I feel lazy now", "I feel like my willpower is gone now").