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40 mins
Teacher/Student led
+75 XP

Spotting Image, Audio and Video Manipulation

Practise identifying whether digital images, audio clips and videos have been altered. Learn to tell the difference between ordinary edits for clarity and changes made to mislead viewers. Use simple checks to decide on a selection of media examples.

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    1 - Start ~4 mins

    Illustration for StartYou already know how digital media can be cropped, filtered, trimmed and layered. Today you will try to spot those edits in other people's work.

    Today’s question

    When you see a finished photo, clip or soundtrack online, can you tell what was done to it?

    Your callWhat it means
    As takenNo good reason to think the capture was changed.
    Fair editingChanged for clarity, length, framing, quality or privacy, without inventing a false story.
    Altered to misleadChanged so people believe something untrue.

    You will use tells, which are clues you can see or hear, instead of guessing.

    2 - Examine and Discuss ~6 mins

    Two edits side by side. An ordinary edit, a crop: a photo of a football match is cropped so the goal and the diving goalkeeper fill the picture. A misleading edit, a cut: the sentence We are not closing the library loses the word not, and becomes We are closing the library.

    Photo on the left: "Goalie" by Bryan Gatchell, U.S. Army, public domain, via Wikimedia Commons.

    Not every change is a trick. Cropping a sports photo so the goal fills the picture is an ordinary edit. An edit becomes a problem when it is hidden and makes the viewer believe something untrue, like cutting a sentence from a speech so the meaning flips.

    Today you will use three verdicts:

    • As taken: nothing important has been changed.
    • Fair editing: the changes make it clearer, shorter, better framed, better quality or more private, without telling a false story.
    • Altered to mislead: the change is meant to make people believe something untrue, or is likely to.

    3 - Hands-on: Manipulation Forensics ~14 mins

    As a class, look at each item below and read its caption. Your teacher will play the clip and the video for everyone, twice each. Then talk it through, saying what changed and whether that tells a false story, and agree on one verdict. Choose your verdict in the activity below before you reveal the reasoning.

    Item 1: the parade photo

    The post

    Posted on a GAA club page: “The teams parade before the final.”

    The photographer's originalThe posted version
    A wide view of Croke Park: the stands, the crowd and the two teams parading on the pitch before the 2009 All-Ireland hurling finalThe same photo, cropped close on the teams parading

    Item 2: the councillor clip

    The post

    Shared on a community page: “Councillor on the youth club budget.” The post does not include the full recording.

    Item 3: the snow video

    The post

    Reposted phone video: “Blizzard batters Dublin as people fight their way home.”

    Once the class has decided on all three, your teacher will open the originals in the fold-out section below the snow video.

    Only after the class has called all three: the originals

    The councillor's full recording:

    The snow video as it was filmed, at normal speed with its real sound:

    The photos and the snow video are real, but the captions, posts and councillor are made up, and a computer made the councillor's voice.

    As taken, fair edit, or altered?

    4 - Your Turn ~10 mins

    On your own or with a partner, judge these two items. Look carefully at each picture before you read its caption, and then write three short lines about it.

    Item 1Item 2
    The stone pier at Loughshinny harbour, County Dublin, on a cloudy morning, with small boats moored on calm waterRed apples in a green crate at a market
    Source: a local photographer, named in the post
    Caption: “Quiet morning at the pier.”
    Source: shop’s own post
    Caption: “New batch in today. Crates full!”

    Click a photo to see it full size.

    For each item, write

    Verdict: as taken, fair editing, or altered to mislead.
    What may have changed?
    The one tell that decided it.

    Where to look

    If two things in a photo look exactly the same, take a second look, because in a real photo no two things are perfectly alike and one may have been copied and pasted. Check too that light and shadow agree across the whole picture, and that reflections match what is above them.

    Before you finish, check that you have:

    • a verdict for both items
    • one clear tell named for each
    • at least one item where you can say why it is as taken or fair editing, rather than altered to mislead

    When everyone has a verdict for both photos, open the answers below.

    Only after you have decided: how each photo was made

    Item 1, the harbour: as taken. This is a real photograph of the pier at Loughshinny, County Dublin, and nothing in it was changed. Nothing repeats, the light falls the same way on the pier, the water and the sky, and the caption says nothing the photo does not show.

    Item 2, the apples: altered to mislead. Two apples were copied and pasted into empty spaces in the crate, so it looks fuller than it is. The caption, “Crates full!”, is what the edit was for.

    The apples photo with the answer marked: two apples circled in red as copies, one at the top left and one near the bottom, and an arrow from the real apple with the eve sticker, on the right, to its copy.

    The clearest copy is the apple with the heart-shaped eve sticker. The real one is on the right of the crate. Its copy is near the bottom, a little smaller, with the sticker at exactly the same angle. No two real apples have the same shape, marks and shine.

    Close up, the real apple with the eve sticker beside its copy: the same shape, the same marks and the sticker at exactly the same angle.

    How to spot this next time
    • Look for two things that are exactly the same. In a real photo, no two things are.
    • Check that the light and the shadows agree across the whole picture.
    • Ask what the caption wants you to believe, and whether the edit is there to make you believe it.

    5 - Make Sense ~3 mins

    Now bring the three verdicts back together.

    Your callWhat it means
    As takenNo good reason to think the capture was changed.
    Fair editingChanged for clarity, length, framing, quality or privacy, without inventing a false story.
    Altered to misleadChanged so people believe something untrue.
    Key point

    Nobody can spot every edit perfectly, so slow down, name the tell, and ask what a viewer would wrongly believe if they trusted the piece at first glance.

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