The emotional availability scales (EAS), 4th edition, are widely used in research and clinical practice to assess the quality of parent-child interaction. This study examined the short-term reliability and continuity of the EAS (4th ed.) assessed in two similar observational contexts over a one-week interval. Sixty-two Dutch parents (85% mothers) and their 9- to 12-month-old infants (M[subscript age] = 10.07 months, SD = 0.47, 53% boys) were videotaped twice while they interacted with each other during several tasks (free play, structured play, book reading, toys taken away). The videotapes were coded with the EAS 4th edition by two reliable coders. Moderate to strong test-retest reliability was found for the three EA parent-dimensions: sensitivity, structuring, and nonintrusiveness. Child involvement was not reliable over a one-week period, and child responsiveness could only be reliably assessed in boys. Test-retest reliability of structuring was also higher for boys than for girls. Regarding continuity, mean levels of sensitivity, structuring, nonintrusiveness, and involvement did not change over a one-week interval, but responsiveness increased for girls only. Thus, the parenting dimensions of the 4th edition of the EAS reflect stable and consistent characteristics of the parent-child dyad on the short term, but the child measures do not.