Antonyms of adj observational

1 sense of observational

Sense 1
experimental, data-based, observational -- (relying on observation or experiment; "experimental results that supported the hypothesis")

INDIRECT (VIA empirical) -> theoretical, theoretic -- (concerned primarily with theories or hypotheses rather than practical considerations; "theoretical science")

Similarity of adj observational

1 sense of observational

Sense 1
experimental, data-based, observational -- (relying on observation or experiment; "experimental results that supported the hypothesis")
       => empirical (vs. theoretical), empiric -- (derived from experiment and observation rather than theory; "an empirical basis for an ethical theory"; "empirical laws"; "empirical data"; "an empirical treatment of a disease about which little is known")