This is a single-site, two-arm, parallel-group randomized clinical trial (RCT). The feasibility, acceptability, and clinical effects of the nurse-led, very brief, preoperative mindfulness based intervention for hip and knee replacement patients will be investigated relative to nurse-led preoperative pain psychoeducation.

A secondary sub-analysis will compare two different styles of mindfulness practice (mindfulness of breath vs. mindfulness of pain) relative to preoperative pain psychoeducation.

Inclusion Criteria:

• 1) Age ≥18,
• 2) Scheduled to undergo unilateral total knee arthroplasty

Exclusion Criteria:

• 1) Cognitive impairment preventing completion of study procedures.
• 2) Current cancer diagnosis,
• 3) Contralateral knee replaced in the previous 3 months,
• 4) Intent to have contralateral knee replaced or other, additional surgical procedure during the study period,
• 5) Intent to add new pain treatments during the study period (except for what is part of the study),
• 6) Other unstable illness judged by medical staff to interfere with study treatment.