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民眾對碳足跡感知程度之探討
碳足跡
• 一項活動或產品的整個生
命週期過程所直接與間接
產生的二氧化碳排放量。
2013/6/10 2
問卷-問卷數量
• Sample Size Calculate
• 信心水準(confidence level):
信心水準是以百分比來表示,
意思是有多大的信心可以樣
本來推論母群。通常是設定
在95%或99%。
http://www.surveysystem.com/sscalc.htm
(95%信心水準,抽樣誤差在5個百分點之內)
260份
(13個題目,13*5=260)
 經驗:以問卷中最大的構面中的題項數目為主,
以5~20倍為抽樣數目,依母體大小決定之。
(multivariate data analysis, 5th ed., Hair, Jr. et al)
• 總樣本數:392份
• 問卷發送方式:網路填答
受測者基本資料
• 性別 • 年齡
54%
46% 男
女
 教育程度
1%
11%
64%
24%
國中與國中以下
高中/高職
大學
研究所以上
17%
56%
10%
14%
3%
20歲以下
21-30歲
31-40歲
41-50歲
51歲以上
您是從哪裡了解到低碳消費?
基本調查
8%
30%
4%
24%
%
18%
10%
從朋友口中
網路、報紙、電
視等媒體宣傳
商家的廣告
環保團體的宣傳
相關政府部門
學校教育
您曾在那一些產品包裝上看到碳足跡標籤?
21%
11%
20%11%
37%
洗衣機 清淨機
(家電)
洗髮精 沐浴乳 洗
衣精 洗碗精 (清
潔用品)飲料利樂包 餅乾
啤酒 (食品)
其他
未曾看過
基本調查
假設購買碳標籤產品有
補助,是否會激起您購
買碳標籤產品的意願?
您是否會受親朋好友影
響而購買碳標籤產品?
76%
2%
22%
會
不會
47%
45%
1%
7%
會
可能會
不會
不一定
SPSS 因素分
析
KMO與Bartlett檢定
• KMO=0.915大於0.6
• 巴氏球形檢定值2985.25
• 顯著性=0.000<α=0.01
• 顯示資料非常適合進行因素分析。
KMO與Bartlett檢定
Kaiser-Meyer-Olkin 取樣適切性量數。 .915
Bartlett 的球形檢
定
近似卡方分配 2985.255
df 78
顯著性 .000
巴氏球形檢定目的在確定各變數
觀察值具有共同變異存在,顯著
水準愈小,表示各變數觀察值具
有共同變異數存在,也就是值得
進行因素分析。
KMO值越接近1,代表淨相關係
數越低,代表抽取共同因素的效
果越好。
解說變異量解說總變異量
元件
初始特徵值 平方和負荷量萃取
總數 變異數的 % 累積% 總數 變異數的 % 累積%
1 6.781 52.161 52.161 6.781 52.161 52.161
2 1.025 7.886 60.047 1.025 7.886 60.047
3 .977 7.519 67.566
4 .718 5.526 73.092
5 .645 4.965 78.057
6 .582 4.481 82.537
7 .541 4.159 86.696
8 .426 3.278 89.974
9 .358 2.753 92.727
10 .308 2.372 95.099
11 .247 1.902 97.001
12 .209 1.604 98.605
13 .181 1.395 100.000
特徵值大於1之標
準,將13個變數濃
縮為2個因素(主成
分)
兩個因素共可解
釋全部變異量之
60.047%。
陡坡圖
• 由陡坡圖判定的
結果較為主觀,
因此H Kaiser學
者提倡以特徵值
達1為選取標
準,是最常被選
用為判斷因素個
數的方法。
• 將因素負荷量較
高,絕對值大於
0.45的數值標示
出來。
轉軸後的成分矩陣
因素/變數名稱
因素
負荷量
特徵值 解釋變異量
因素一:環境保護的重要性
貢獻自己的力量保護環境
全球環保趨勢
低碳對台灣各項發展有貢獻
政府減碳宣導
減少二氧化碳排放等溫室氣體排放
環境教育
政府對碳足跡標籤產品的補助
碳足跡標籤的規範
產品上碳足跡標籤對消費者的重要性
0.793
0.789
0.747
0.713
0.705
0.682
0.635
0.56
0.454
6.781 52.161
因素/變數名稱 因素負荷量 特徵值解釋變異量
因素二:碳標籤信賴程度及商品品質
碳足跡標籤的可信度
碳標籤數值的真實性
碳足跡標籤商品的品質
產品上碳足跡標籤對消費者的重要性
0.869
0.808
0.779
0.499
1.025 7.886
結果與討論
• 環境教育的落實
– 大眾了解環境資訊的管道來自於媒體或環保團
體,教育可以給予更客觀的資訊,讓人民更深
入的思考環境問題。
• 因素分析結果
– 如果大家對低碳、碳標籤等措施有基礎的認識
和了解,其實會很願意支持,也認為對環境、
產業都有幫助。
– 重視碳標籤的制度以及商品的品質,價格和政
府補助的部分在大眾心中非最重要的。

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民眾對碳足跡感知程度之探討