手法を比較

	Bass Diffusion Model	Technology Acceptance Model
分野	Science Technology Studies	Science Technology Studies
系統	Regression model	Latent structure
提唱年	1969	1989
提唱者	Frank M. Bass	Fred D. Davis
種類	Nonlinear diffusion / growth model	Latent-variable behavioural model
原典	Bass, F. M. (1969). A new product growth for model consumer durables. Management Science, 15(5), 215-227.	Davis, F. D. (1989). Perceived usefulness, perceived ease of use, and user acceptance of information technology. MIS Quarterly, 13(3), 319-340.
別名	Bass model, New product growth model, Innovation diffusion model	TAM, Davis acceptance model, Technology adoption model
関連	3	3
概要	The Bass diffusion model is a parsimonious mathematical model of how a new product or technology spreads through a market over time, introduced by Frank Bass in 1969. It represents adoption as the combined effect of two forces—external influence (mass media, advertising) acting on innovators and internal influence (word of mouth, imitation) acting on imitators—producing the characteristic S-shaped cumulative adoption curve from a fixed pool of eventual adopters.	The Technology Acceptance Model (TAM) is a theoretical model of why people accept or reject information technology, introduced by Fred Davis in 1989. Adapting the Theory of Reasoned Action, it posits that two beliefs—perceived usefulness and perceived ease of use—shape attitudes and behavioural intention toward a system, which in turn drives actual use. The constructs are measured with validated survey scales and the relations are typically estimated as a structural equation model.