Which mode of spreading a message is usually more effective than indirect transmission?

Face-to-face transmission Transmission through mass media Transmission through visual media Transmission through letters and pamphlets

Face-to-face transmission

Face-to-face transmission of the message is usually more effective than indirect transmission, as for instance, through letters and pamphlets or even through mass media. Now a days transmission through visual media such as television and the Internet are similar to face-to-face interaction, but not a substitute for Face-to-face transmission.