Communication for Development in Home Science Questions and Answers

Answer: A

The key gives iii iv i ii.

A cinema projector is the direct projection, an overhead projector the indirect projection, and an opaque projector the reflective projection, and television is the non-projected medium in this list.

The other codes give the cinema projector or television the wrong kind of projection. In the key, a cinema projector throws the image directly on the screen, an overhead projector sends it by a mirror, and an opaque projector reflects light from the flat object. Television shows a picture without projecting it onto a screen.

Answer: B

The epidiascope is known as an opaque projector. It projects the image of opaque objects, such as pages of a book, pictures and small objects, onto a screen by reflected light, without a transparency.

An overhead projector uses transparencies placed on a stage and a slide projector uses slides. 'Indirect projector' is not a recognised name. So the answer is the opaque projector. The word epidiascope is made from Greek parts meaning to show on top, and the machine shows the surface of the object.

Answer: B

Flash cards and slides are presentation type visual aids, so II and III are correct. They are shown to a group to present points one at a time.

A pamphlet is a printed take-away and a bulletin board is a display aid, so the options that include I or IV, namely A, C and D, are wrong. Option B is the answer. Presentation aids are those used by the teacher in front of the audience to put across a point, whereas a bulletin board is mainly for display and a pamphlet is handed out for later reading.

Answer: C

Both statements are true. All human communication has some source, a person or a group of persons, with a purpose, and the purpose has to be expressed as a message.

This follows the usual model of communication, in which the source encodes its purpose in a message. Since both are accepted by the key, option C is correct. The model of communication therefore starts from a purposeful source, which is why the two statements agree and the second spells out how the first works.

Answer: D

The Berlo model (SMCR) runs from the source (II) to the encoder (VI), which produces the message (I), carried by the channel (III) to the decoder (IV) and then to the receiver (V). So the sequence is II, VI, I, III, IV, V.

Options A, B and C place the receiver, decoder or channel ahead of the message or reverse the roles of encoder and source, which breaks the flow of the model. Berlo's model is also known by the letters SMCR, for source, message, channel and receiver.

Answer: C

A bulletin board is a display of messages (3), a diagram is a line drawing of an object or an idea (5), a model is a miniature replica of an object (1) and a diorama is a scenic representation of the original (4). So the code is 3, 5, 1, 4.

The other options either give the diagram the wrong meaning, such as transparent big size photographs, or give the model another description. Option B gives the diorama the replica description, and so fails.

Answer: C

The ideal size of a flash card is 10 x 12 inches, as the key states. Flash cards are held up briefly before a group to show a picture or word, so they must be large enough to be read from a distance but small enough to be handled quickly. A card 22 x 28 inches is poster size, 8 x 10 inches is too small for a group, and 12 x 12 inches is not the recommended dimension. The size matters because the card must be seen at a glance by learners seated at the back, with a single word or picture in bold letters. A card that is too small would not be legible to the group.

Answer: C

The Assertion is not correct and the Reason is correct, as the key states. There is in reality no single best teaching aid, because the right aid depends on the situation in which it is used. The Assertion says audio-visual aids are not the best teaching aid, which the key regards as incorrect, since they are among the most useful aids. So option C is the answer. Choice of an aid depends on the age of the learners, the topic, the facilities and the cost. A good teacher selects aids to fit the lesson, so the statement that none is best in every case is sound.

Answer: C

In Edgar Dale's cone of experience, the base is the most concrete experience and the apex is the most abstract. Starting from the base, the divisions run from doing, to observing, to symbolizing. That is III, I, II, which is option C. The other arrangements place symbolic experience, which is the most abstract, at or near the base. The cone moves from direct, purposeful experiences at the base through contrived experiences, demonstrations, field trips, exhibits, television and films, to visual and verbal symbols at the tip. This is why learning by doing is placed at the base.

Answer: D

The correct matching is a-iv, b-ii, c-i, d-iii, which is option D. The written form of communication includes circular letters, the spoken form includes debate, the pictorial form includes graphics, and the action form includes demonstrations. Options A, B and C put at least one of these forms against a wrong example, such as demonstrations for written communication. Methods of communication can be grouped as written, spoken, pictorial and action forms, and the same message is often put across in more than one form to improve understanding.